Видавнича дiяльнiсть відділу алгебри

Publications of Department of Algebra

Published monographies:

Shchedryk V. Arithmetic of matrices over rings – Kyiv, Akademperiodyka, 2021. − 278 p. − https://doi.org/10.15407/akademperiodika.430.278 pdf.
Vasyl Fedorchuk, Volodymyr Fedorchuk. Classification of Symmetry Reductions for the Eikonal Equation. – Institute of Mathematics, Pedagogical University, Cracow, Poland; Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of National Academy of Sciences of Ukraine, Lviv, 2018. – 176 p. pdf
Shchedryk V.P. Factorization of matrices over elementary divisor rings. – Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine, 2017. – 304 p. (in Ukrainian) pdf.
Petrychkovych V.М. Generalized equivalence of matrices and its collections and factorization of matrices over rings. – L’viv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of the NAS of Ukraine, 2015. – 312 p. pdf. (in Ukrainian)
Kazimirs’kii P.S. Factorization of matrix polynomials (second edition revised). – L’viv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of the NAS of Ukraine, 2015. – 282 p. pdf. (in Ukrainian)
Shmoilov B. I. Solving of algebraic equations by continuous fractions. – Lvov: Merkator. – 2003. – 599 p. (in Russian)
Shmoilov B. I. Continuous fractions and two classical problems of algebra. – Lvov: Merkator. – 2003. – 862 p. (in Russian)
Protasov I., Zelenyuk E. Topologies on groups determined by sequences. – Mathematical Studies: Monograph series, Vol. 4, VNTL Publishers. – 1999. – 112 p.
Kazimirs’kii P.S. Factorization of matrix polynomials. – K.: Naukova dumka. – 1981. – 224 p. (in Ukrainian)

Publications in journals:

2025

Korzhik V. The number of nonisomorphic nonorientable 6-gonal embeddings of complete graphs // Discrete Applied Mathematics. – 2025. – V. 375. – P. 123–128. https://doi.org/10.1016/dam.2025.05.040 (Scopus, Q2)

Prokip Volodymyr. On solutions of matrix equation AX= B over a Bezout domain // The Electronic Journal of Linear Algebra. - 2025. - V. 41. - P. 181-192. https://doi.org/10.13001/ela.2025.8985 (Scopus, Q2)

Prokip, V.M., Mel’nyk, O.M. and Kolyada, R.V. On the Divisibility with Remainder of Polynomial Matrices Over an Arbitrary Field // Journal of Mathematical Sciences. – 2025. – 291, Issue 5. – P. 586–607. https://doi.org/10.1007/s10958-025-07839-5 (Scopus, Q3)
Fedorchuk, V.M., Fedorchuk, V.I. On Partial Preliminary Group Classification for Some Class of (1+3)-Dimensional Monge–Ampère Equations. I. One-Dimensional Lie Algebras. // Journal of Mathematical Sciences. – 2025. – 291, Issue 5. – P. 608–616. https://doi.org/10.1007/s10958-025-07840-y (Scopus, Q3)
Shavarovskii B. Z. On the Triangular Form of aPolynomial Matrix of Simple Structure and its Invariants with Respect to Semiscalar Equivalence // Journal of Mathematical Sciences. - 2025. - 291, Issue 5. - P. 578-585. https://doi.org/10.1007/s10958-025-07838-6 (Scopus, Q3)
Shavarovskii B. Z. On the Triangular Form of 3x3-Matrices of Simple Structure Relative to Semiscalar Equivalence // Journal of Mathematical Sciences. - 2025. - 287, Issue 2. - P. 105-133. https://doi.org/10.1007/s10958-025-07579-6 (Scopus, Q3)
Shchedryk V. P. Arithmetic Properties of the Solutions of Linear Equations // Journal of Mathematical Sciences. – 2025. – 287, No.2. – P. 153–159. https://doi.org/10.1007/s10958-025-07579-6 (Scopus, Q3)

2024

Ladzoryshyn N.B., Petrychkovych V.M. Standard forms of matrices with respect to (z,k)-equivalence and matrix equations over quadratic rings // Mat. Metody Fiz.-Mek. Polya. – 2024. – 67, № 3–4. (in Ukrainian)
F. M. Sokhatsky, H. V. Krainichuk, V. A. Luzhetsky, Canonical and matrix figuration of quasigroups of the fourth order. Prykl. Probl. Mekh. Mat., Issue 22, 95-105 (2024) (in Ukrainian), https://doi.org/10.15407/apmm2024.22.95-105
Shavarovskii B.Z On the classification of one type of polynomial matrices of simple structure with respect to semiscalar equivalence // Mat. Metody Fiz.-Mekh. Polya. - 2024. - 67, № 1-2. - P. 5-14. https://doi.org/10.15407/mmpmf2024.67.1-2.5-14 (in Ukrainian).
Romaniv A. M. On the divisibility of common multiples of matrices of the third order over commutative Bezout domains of stable range 1.5 // Prykl. Probl. Mekh. Mat., Issue 22, 31–36 (2024) (in Ukrainian), https://doi.org/10.15407/apmm2024.22.31-36
Fedorchuk V.M., Fedorchuk V.I. On the Construction and Classification of the Common Invariant Solutions for the (1+3)-Dimensional Euler – Lagrange – Born – Infeld and Homogeneous Monge – Ampère Equations // Mat. Metody Fiz.–Mekh. Polya. – 2024. – 67, № 1–2. – P. 15–24. doi: 10.15407/mmpmf2024.67.1-2.15-25 (in Ukrainian)
Romaniv A. M., Shchedryk V. P. Reduction of invertible matrices by two-sided transformations from Zelisko groups to a simpler form // Carpathian Mathematical Publications. – 2024. – 16 (2). – P. 500–511. doi:10.15330/cmp.16.2.500-511 (Scopus, 1.0, Q1)
Shchedryk V. Parametric 2-Decompositions in Complete Linear Groups of Small Order Over a Field // Ukrainian Mathematical Journal. – 2024. – 76 (2). – P. 330–348. https://doi.org/10.1007/s11253-024-02323-w (Scopus, 0.669, Q3)
Dzhaliuk N.S., Petrychkovych V.M. Matrix linear bilateral equations over different domains, methods for the construction of solutions, and description of their structure // Journal of Mathematical Sciences. – 2024. – 282, No.5. – P. 616–645. https://doi.org/10.1007/s10958-024-07206-w (Scopus, 0.523, Q3)
Dzhaliuk N.S., Petrychkovych V.M. Kronecker product of matrices and solutions of Sylvester-type matrix polynomial equations // Matematychni Studii. – 2024. – 61, No.2. – P. 115–122. https://doi.org/10.30970/ms.61.2.115-122 (Scopus, 0.675, Q3)
Romaniv A. M., Shchedryk V. P. Adequate Properties of Matrix Divisors // Journal of mathematical sciences. – 2024. – 279, No 2 – P. 141–150. https://doi.org/10.1007/s10958–024–07001–7
Ladzoryshyn N.B., Petrychkovych V.M. On standard forms of the pairs of matrices over the ring of Gaussian integers with respect to the (z,k)–equivalence // Journal of mathematical sciences – 2024. – 279, No 2 – P. 133–140. https://doi.org/10.1007/s10958–024–07000–8
Korzhik V. All 2-planar graphs having the same spanning subgraph // The Art of Discrete and Applied Mathematics. – 2024. – V. 7. – P. 1 – 31. https://doi.org/10.26493/2590-9770.1632.16d (Scopus, 0.423, Q4)
Fedorchuk V.M., Fedorchuk V.I. On the Symmetry Reduction of the (1+3)-Dimensional Inhomogeneous Monge–Ampère Equation to Algebraic Equations // Journal of Mathematical Sciences. – 2024. – 282, No.5. – P. 668–677. https://doi.org/10.1007/s10958-024-07208-8 (Scopus, Q3)

2023

Zelisko H. V., Ladzoryshyn N.B., Petrychkovych V.M. Linear matrix bilateral equations over quadratic rings with involution (with Zelisko H. V. and Petrychkovych V.M.) // Appl. probl. mech. and math. – 2023. – 21 – P. 5–16. https://doi.org/10.15407/apmm2023.21.5-16 (in Ukrainian)
Bovdi, V. A., Shchedryk, V. P. Generating solutions of a linear equation and structure of elements of the Zelisko group II // Quaestiones Mathematicae – 2023 – 46 (9) – P. 1789–1798. https://doi.org/10.2989/16073606.2022.2112629
Fedorchuk V.М. and Fedorchuk V.I. On the Classification of Symmetry Reductions for the (1+3)–Dimensional Monge–Ampère Equation. // Journal of Mathematical Sciences. – 2023. – 272, No. 1. – P. 1–13. https://doi.org/10.1007/s10958–023–06395–0
Romaniv A. M. On the Smith normal form of the least common multiple of matrices from some class of matrices // Journal of mathematical sciences. – 2023. – 277, No. 1. – P. 53–59. https://doi.org/10.1007/s10958–023–06813–3
Gatalevych, A. I., Shchedryk V. P. On adequacy of full matrices // Matematychni Studii. – 2023. – 59.2 – P.115–122. https://doi.org/10.30970/ms.59.2.115–122
Fedorchuk V.M. and Fedorchuk V.I. On the Construction and Classification of the Common Invariant Solutions for Some P(1,4) – Invariant Partial Differential Equations // Applied Mathematics. – 2023 – Vol. 14, No.11 – P. 728–747. https://doi.org/10.4236/am.2023.1411044
Shavarovskii B.Z. On the triangular form of a polynomial matrix of simple structure and its invariants with respect to semi–scalar equivalence // Mat. Metody Fiz.–Mekh. Polya. – 2023. – 66, № 1–2. – P. 16–22. (in Ukrainian).
Prokip V.M., Melnyk O.M., Kolyada R.V. On divisibility with remainder of polynomial matrices over an arbitrary field // Mat. Metody Fiz.–Mekh. Polya. – 2023. – 66, № 1–2. – P. 23–39 (in Ukrainian).
Fedorchuk V.M., Fedorchuk V.I. On partial preliminary group classification of some class of the (1+3)–dimensional Monge – A mpère equations. I. One–dimensional Lie algebras // Mat. Metody Fiz.–Mekh. Polya. – 2023. – 66, № 1–2. – P. 40–47. (in Ukrainian).

2022

Petrychkovych V.M. Standard forms of matrices over rings with respect to different types of equivalences and their applications in theory of the matrix factorization and matrix equations // Journal of Mathematical Sciences. – 2022. – 265, No. 3. – P. 345–368.– https://doi.org/10.1007/s10958–022–06057–7.
Shchedryk V.P. Arithmetic properties of the solutions of linear equations // Mat. Metody Fiz.–Mekh. Polya. – 2022. – 65, № 3–4. – P. 44–49. (in Ukrainian)

Bovdi V., Shchedryk V. Adequacy of nonsingular matrices over commutative principal ideal domains – arXiv preprint arXiv:2209.01408, 2022

Shavarovskii B.Z. On the Triangular Form of 3 X 3–Matrix of Simple Structure Relative to Semiscalar Equivalence // Mat. Metody Fiz.–Mekh. Polya. – 2022. – 65, № 3–4. – P. 5–28.

Shavarovskii B.Z. Conditions of semiscalar equivalence of one class 3x3 matrices of simple structure // Journal of Mathematics. − 2022. − vol. 2022 Article ID 8395922, 13 pages. − https://doi.org/10.1155/2022/8395922.
Fedorchuk V.M. , Fedorchuk V.I. Reduction of the (1 + 3)–dimensional Inhomogeneous Monge–Ampère equation to first–order partial differential equations // Ukrainian Mathematical Journal. – 2022. – 74, No. 3. – P. 472–483. – https://doi:10.1007/s11253–022–02076–4.
Fedorchuk V.M., Fedorchuk V.I. On reduction of the (1+3)–dimensional inhomogeneous Monge–Ampère equation to the first–order partial differential equations // Ukr. Math. J. – 2022. – 74, No. 3. – P. 418–426. – https://doi:10.37863/umzh.v74i3.6996. (in Ukrainian)

Fedorchuk V.M., Fedorchuk V.I. on symmetry reduction of the (1+3)–dimensional inhomogeneous Monge – Ampère equation to algebraic equations // Mat. Metody Fiz.–Mekh. Polya. – 2022. – 65, № 1–2. – P. 58–64. (in Ukrainian).
Dzhaliuk N.S., Petrychkovych V.M. Matrix linear bilateral equations over different domains, methods for construction of solutions and description of their structure // Mat. Metody Fiz.–Mekh. Polya. – 2022. – 65, № 1–2. – P. 18–41. (in Ukrainian).

Dzhaliuk N. S. and Petrychkovych V. M. Equivalence of matrices in the ring M(n,R) and its subrings // Ukrainian Mathematical Journal. – 2022. – 73, No.12. – P. 1865– 1872. – https://doi.org/10.1007/s11253–022–02034–0.
Dzhaliuk N.S. Solutions of matrix equation AX+YB=C with triangular coefficients // Journal of Mathematical Sciences. – 2022. – 261, No. 1. – P. 25–32. – https://doi:10.1007/s10958–022–05734–x.
Ladzoryshyn N.B., Petrychkovych V.M. The number of standard forms of matrices over imaginary Euclidean quadratic rings with respect to the (z,k)–equivalence // Matematychni Studii. – 2022. – 57, No. 2. – P. 115–121. https://doi:10.30970/ms.57.2.115–121
Korzhik V. A simple proof of the Map Color Theorem for nonorientable surfaces // Journal of Combinatorial Theory, Ser. B. – 2022. – Vol. 156. – P. 1 – 17. https://doi.org/10.1016/j.jctb.2022.03.004
Prokip V. M. A note on semiscalar equivalence of polynomial matrices // Electronic Journal of Linear Algebra. – 2022. – V. 38. – P. 195–203. https://doi.org/10.13001/ela.2022.65
Bilous A.M., Gatalevych A.I. Stable range of some classes of noncommutative rings // Journal of Mathematical Sciences − 2022. − 261, № 1 − P. 33–40. https://doi.org/ 10.1007/s10958–022–05735–w

Romaniv A.M., Dzhaliuk N.S. The structure of the Smith normal form of the greatest common divisor and the least common multiple of the third order matrices over Bezout domains of stable range 1.5 // Applied problems of mechanics and mathematics. – 2022. – Vol 20. – P. 25–30. (in Ukrainian).

2021

Ladzoryshyn N. B., Petrychkovych V. M. Standard form of matrices over quadratic rings with respect to the (z,k)–equivalence and the structure of solutions of bilateral matrix linear equations. // Journal of Mathematical Sciences. − 2021. − Vol. 253, No. 1, February. – Р. 54–62. https://doi.org/10.1007/s10958–021–05212–w

Romaniv A. M., Shchedryk V. P. Adequate properties of matrix divisors // Mat. Metody Fiz.–Mekh. Polya. – 2021. – 64, № 4. – P. 25–31. (in Ukrainian)

Bovdi V.A., Shchedryk V.P. Generating solutions of a linear equation and structure of elements of the Zelisko group // Linear Algebra and Applications. − 2021. − Volume 625. − P. 55−67. https://doi.org/10.1016/j.laa.2021.04.019
Ladzoryshyn N. B., Petrychkovych V. M. On standard forms of pairs of matrices over the ring of gaussian integers with respect to (z,k)–equivalence // Mat. Metody Fiz.–Mekh. Polya. – 2021. – 64, № 4. – P. 18–24. (in Ukrainian).
Shchedryk V. The left greatest common divisor and the left least common multiple for all solutions of the matrix equation BX = A over a commutative domain of elementary divisors // Ukrainian Mathematical Journal. − 2021. − 73, No. 2. − P. 303–310. − https://doi.org/10.1007/s11253–021–01923–0.

Shchedryk V. The left greatest common divisor and the left least common multiple for all solutions of the matrix equation BX = A over a commutative domain of elementary divisors // Ukrainian Mathematical Journal. – 2021. – 73, № 2. – P. 261–267. − https://doi.org/10.37863/umzh.v73i2.6321. (in Ukrainian)
Vasyl Fedorchuk, Volodymyr Fedorchuk. On symmetry reduction and some classes of invariant solutions of the (1 + 3)–dimensional homogeneous Monge–Ampère equation. // Proceedings of the International Geometry Center , Vol. 14, no. 3 (2021) pp. 206–218. https://doi.org/10.15673/tmgc.v14i3.2078
Dzhaliuk N.S. Existence of the solution of the Sylvester–type matrix equation in the ring of block triangular matrices // Applied problems of mechanics and mathematics. – 2021. – Vol. 19. – P. 79−83. (in Ukrainian)
Dzhaliuk N.S., Petrychkovych V.M. Equivalence of matrices in the ring M(n,R) and in its subrings // Ukrainian Mathematical Journal. – 2021. – 73, № 12. – P. 1612–1618. https://doi.org/10.1007/s11253–021–01923–0. (in Ukrainian)

Shavarovskii B.Z. Oriented by characteristic roots reduced matrices in the class of semiscalarly equivalent // Journal of Mathematics. − 2021. − vol. 2021 Article ID 5592756, 6 pages. − https://doi.org/10.1155/2021/5592756.
Romaniv A. M. On the Smith normal form of least common multiple matrices from some class of matrices // Mat. Metody Fiz.–Mekh. Polya. – 2021. – 64, № 2. – P. 47–51.
Romaniv A. M. Сonditions for constructing of a square matrix which contains a square submatrix with given invariant factors // Applied problems of mechanics and mathematics. – 2021. – Vol. 19 – P. 84–87.
Shchedryk V. Classification of Parametric Solutions of One–Sided Matrix Equations by the Transforming Matrices of Their Characteristic Matrices // Journal of Mathematical Sciences – 2021 – Vol. 254, No. 1 – P. 1–7. https://doi.org/10.1007/с10958–021–05283–9
Prokip V.М. Canonical form of involutory matrices over the domain of principal ideals with respect to similarity transformations. // Journal of Mathematical Sciences − 2021. − 258, No. 4 − P. 437–445. https://doi.org/10.1007/s10958–021–05558–1
Prokip Volodymyr M. On the semi–scalar equivalence of polynomial matrices over a field // Modeling, Control and Information Technologies: Proceedings of International scientific and practical conference. – 2021. – №.5. – P. 80–82. https://doi.org/10.31713/MCIT.2021.25

2020

Petrychkovych V. M., Zelisko H. V.,. Ladzoryshyn N. B. The standard form of matrices over the ring of gaussian integers with respect to (z, k)–equivalence // Applied problems of mechanics and mathematics. − 2020. – 18. – Р. 5–10. – https://doi.org/10.15407/apmm2020.18.5–10. (in Ukrainian)
Ladzoryshyn N. B., Petrychkovych V. M., Zelisko H. V. Matrix Diophantine equations over quadratic rings and their solutions // Carpathian Math. Publ. − 2020. −12, №2. – Р. 340–347. https://doi.org/10.15330/cmp.12.2.368–375
Shavarovskii B.Z. Reduction to a Canonical Form of a Third–order Polynomial Matrix with One Characteristic Root by means of Semiscalarly Equivalent Transformations // Journal of Mathematics, vol. 2020, Article ID 7960987, 10pages, 2020. https://doi.org/10.1155/2020/7960987
Fedorchuk V.M., Fedorchuk V.I. On the classification of symmetry reductions for the (1+3)–dimensional monge – ampère equation // Mat. Metody Fiz.–Mekh. Polya. – 2020. – 63, (2). – P. 7–16. (in Ukrainian)
Fedorchuk V.M. and Fedorchuk V.I. On Symmetry Reduction of the (1 + 3)–Dimensional Inhomogeneous Monge–Ampère Equation to the First–Order ODEs // Applied Mathematics. − 2020. − 11. − P. 1178−1195. https://doi.org/10.4236/am.2020.1111080
Zabavsky B., Romaniv A., Kysil T. Elementary reduction of matrices over rings of almost stable range 1 // Algebra and Discrete Mathematics. – 2020. – 29, No. 2. – P. 271–276. https://dx.doi.org/10.12958/adm1211.
Prokip V. Semi–scalar equivalence of polynomial matrices // arXiv preprint https://arxiv.org/pdf/2003.05041.pdf, 2020, 11 pages.
Prokip V. M. Equivalence of Polynomial Matrices over a Field // Hot Topics in Linear Algebra. –2020 – Chapter 6. – Р. 205–232.
Prokip V. On solvability of the matrix equation AXB = C over a principal ideal domain // Modeling, Control and Information Technologies: Proceedings of International scientific and practical conference. – 2020. – №. 4. – С. 47–50. https://doi.org/10.31713/MCIT.2020.09
Shchedryk V. A greatest common divisor and a least common multiple of solutions of a linear matrix equation // arXiv preprint https://arxiv.org/pdf/2011.05173.pdf, 2020, 9 pages.

2019

Petrychkovych V.M. Standard forms of matrices over rings with respect to different types of equivalences and their applications in theory of the matrix factorization and matrix equations // Mat. Metody Fiz.–Mekh. Polya. 62, (4), 7–27, (2019). (in Ukrainian).
Bovdi V.A., Shchedryk V.P. Commutative Bezout domains of stable range 1.5 // Linear Algebra and its Applications. – 2019. – Volume 568. − P. 127−134. https://doi.org/10.1016/j.laa.2018.06.012
Bilous A. Idempotent matrices over a duo ring // Matematychni Studii. – 2019. – V. 52, No. 3. – P. 133–137. http://matstud.org.ua/texts/2019/52_2/133–137
Bilous A. M., Gatalevych A. I. Stable range of some classes of non–commutative rings // Mat. Metody Fiz.–Mekh. Polya. 62, (2), P. 32–37, (2019). (in Ukrainian)
Dzhaliuk N. S. Solutions of matrix equation AX+YB=C with triangular coefficients // Mat. Metody Fiz.–Mekh. Polya. 62, (2), 26–31, (2019). (in Ukrainian)
Dzhaliuk Nataliia S., Petrychkovych Vasyl' M. Solutions of the matrix linear bilateral polynomial equation and their structure // Algebra and Discrete Mathematics. – 2019. – 27, № 2. – P. 243–251.
Romaniv A. M., Dzhaliuk N. S. Some relationships between the invariant factors of matrix and its submatrix over elementary divisor domains // Applied problems of mechanics and mathematics. – 2019. – 17. – P. 38−41. https://doi.org/10.15407/apmm2019.17.38–41
Fedorchuk V.M., Fedorchuk V.I., On symmetry reduction of the Euler–Lagrange–Born–Infeld equation to linear ODEs // Symmetry and Integrability of Equations of Mathematical Physics, Collection of Works of Institute of Mathematics, Kyiv. − 2019. − 16, № 1. − P. 193−202.
Fedorchuk V.M., Fedorchuk V.I., On the classification of symmetry reduction and invariant solutions for the Euler–Lagrange–Born–Infeld equa–tion. // Ukrainian Journal of Physics. − 2019. − Vol. 64, No. 12. − P. 1103−1107. https://doi.org/10.15407/ujpe64.12.1103.
Shavarovskii B.Z. Non–singular solutions of one class of matrix equations over a polynomial ring // Applied problems of mechanics and mathematics. – 2019. – Issue 17. – P. 17–26. https://doi.org/10.15407/apmm2019.17.17–26 (in Ukrainian)
Shavarovskii B.Z. Canonical Form of Reduced 3–by–3 Matrix with One Characteristic Root and with Some Zero Subdiagonal Elements // Journal of Mathematics. − 2019. − Volume 2019, Article ID 7646132, 10 pages. https://doi.org/10.1155/2019/7646132
Prokip Volodymyr On Solvability of the Matrix Equation AX–XB=C over Integer Rings // Modeling, Control and Information Technologies. –2019. – № 3. – Р.55–58. https://doi.org/10.31713/MCIT.2019.04
Prokip V.M. The canonical form of involutory matrices over the principal ideal domain with respect to similarity transformation // Mat. Metody Fiz.–Mekh. Polya. – 2019. – 62, № 1. – P.59–66. (in Ukrainian)
Prokip V.M. On structure of matrices over a principal ideal domain with respect to similarity transformation // Proc. Intern. Geom. Center. – 2019. – V. 12, № 1. – P. 56–69. https://doi.org/10.15673/tmgc.v12i1.1368 (in Ukrainian)
Prokip V.M., Kolyada R.V., Melnyk O.M. About square roots of matrices over an arbitrary field // Scientific papers UAP. – 2019. – 59, № 2. – P. 56–64. (in Ukrainian)
Prokip V. M. On the Solvability of a System of Matrix Equations AX = B and BY = A Over Associative Rings. // Journal of Mathematical Sciences. – 2019. – 238, No.1. – P. 22–31. https://doi.org/10.1007/s10958–019–04215
Prokip V. М. Structure of Rank–One Matrices Over the Domain of Principal Ideals Relative to Similarity Transformations. // Journal of Mathematical Sciences. – 2019. – 236, No.1. – P. 71–82. https://doi.org/10.1007/s10958–018–4098–0
Prokip V. М. On the divisibility of matrices with remainder over the domain of principal ideals // Journal of Mathematical Sciences − 2019. − 243, No.1 − P. 45–55. https://doi.org/10.1007/s10958–019–04524–2

2018

Ladzoryshyn N.B., Petrychkovych V.M. The standard form of matrices over quadratic rings with respect (z,k)–equivalence and structure of solutions of matrix bilateral linear equations // Mat. Metody Fiz.–Mekh. Polya. – 2018. – №61, (2). – P. 49–56. (in Ukrainian)
Ladzoryshyn N.B., Petrychkovych V.M. Matrix linear unilateral and bilateral equations over quadratic rings // Visnyk of the Lviv Univ. Series Mech. Math. – 2018. – № 85. – P. 32–40. http://dx.doi.org/10.30970/vmm.2018.85.032–040 (in Ukrainian)
Romaniv A.M. On the structure of least common multiple matrices from some class of matrices // Carpathian Math. Publ. – 2018. – 10, No. 1. – P. 179–184. https://doi.org/10.15330/cmp.10.1.179–184.
Romaniv A. M., Zabavsky B. V., Bilavska S. I. Adequate properties of the elements with almost stable range 1 of a commutative elementary divisor domain // Applied problems of mechanics and mathematics. – 2018. – Issue 16. – P. 33–35. https://doi.org/10.15407/apmm2018.16.33–35
Shavarovskii B.Z. Reduced Triangular Form of Polynomial 3–by–3 Matrices with One Characteristic Root and Its Invariants // Journal of Mathematics. Volume 2018, (2018), Article ID 3127984, 6 pages. (http://doi.org/10.1155/2018/3127984).
Shavarovskii B.Z. About some invariants of polynomial matrices with respect to semiscalar equivalence // Applied problems of mechanics and mathematics. – 2018. – Issue 16. – P. 14–18. https://doi.org/10.15407/apmm2018.16.14–18 (in Ukrainian)
Bovdi Victor A., Shchedryk Volodymyr P. Commutative Bezout domains of stable range 1.5 // arXiv preprint https://doi.org/10.48550/arXiv.1806.0474 , 2018, 9 pages
Prokip V. M. On the similarity of matrices AB and BA over a field // Carpathian Mathematical Publications. – 2018. – V. 10. – № 2. – P. 352–359. https://doi:10.15330/cmp.10.2.352–359
Shchedryk V. Classification of Parametric Solutions of One–Sided Matrix Equations by the Transforming Matrices of Their Characteristic Matrices // Mat. Metody Fiz.–Mekh. Polya. – 2018– Vol. 61, №.3 – P. 7–15. (in Ukrainian)
Shavarovskii B. Z. Semiscalar equivalence and quasidiagonal similarity of the matrices // Journal of Mathematical Science 2018. – 228, № 1. – P.11–25. https://doi.org/10.1007/s10958–017–3602–2

2017

Shchedryk V. P. Bezout Rings of Stable Range 1.5 and the Decomposition of a Complete Linear Group into the Product of its Subgroups // Ukrainian Mathematical Journal – 2017. – 69 – P.138–147. https://doi.org/10.1007/s11253–017–1352–4
Bilous A. Effective duo rings // Visnyk of the Lviv Univ. Series Mech. Math. – 2017. – 84. – P. 47–52 http://prima.lnu.edu.ua/faculty/mechmat/Departments/MathVisnykLU/VLUsMath–84/VisnM–84–047.pdf. (in Ukrainian)
Bilous A., Gatalevych A.I. 2–good abelian and duo rings with conditions of a stable range // Applied problems of mechanics and mathematics. – 2017. – 15. – P. 16 – 20. (in Ukrainian)
Petrychkovych V., Dzhaliuk N. Factorizations in the rings of the block matrices // Bul. Acad. Stiinte Repub. Mold. Mat. – 2017. – 85, Number 3. – P. 23–33.
Petrychkovych V., Dzhaliuk N. Factorizations in the matrix ring and its subrings of the block matrices // Proceedings The Fourth Conference of Mathematical Society of the Republic of Moldova: dedicated to the centenary of Vladimir Andrunachievici (1917–1997) / ed.: Mitrofan Choban [et al.]. Chisinau: Institute of Mathematics and Computer science, 2017 (CEP USM). – P. 143–146.
Dzhaliuk N.S., Petrychkovych V.M. The structure of solutions of the matrix linear unilateral polynomial equation with two variables // Carpathian Math. Publ. – 2017. – 9, No. 1. – P. 48–56.
Ladzoryshyn N.B. Integer solutions of matrix linear unilateral and bilateral equations over quadratic rings // Journal of Mathematical Sciences. – 2017. – 223, № 1. – P. 50–59, doi:10.1007/s10958–017–3337–0.
Romaniv A. M. Least common multiple of one class of matrices // Applied problems of mechanics and mathematics. – 2017. – No. 15. – P. 29–34.
Shavarovskii B.Z. Toeplitz Matrices in the Problem of Semiscalar Equivalence of Second–Order Polynomial Matrices // International Journal of Analysis. Volume 2017, (2017), Article ID 6701078, 14 pages (http://doi.org/10.1155/2017/6701078).
Shavarovskii B.Z. Conditions of Semiscalar Equivalence of Polynomial 2–by–2 Matrices // Mathematical Bulletin of Taras Shevchenko Scientific Society. – 2017. – 14. – P. 7–28.
Shavarovskii B.Z. Block–Diagonal Similarity and Semisсalar Equivalence of Matrices // Journal of Mathematical Sciences. – 2017. – 222, No. 1 – P. 35–49.
Shchedryk V.P. Bezout ring of stable range 1.5 and decomposition of complete linear group into product its subgroups // Ukrainian Mathematical Journal. – 2017. – 69, No. 1. – P. 113 – 120 (in Ukrainian).
Fedorchuk V.I. On invariant solutions of some five–dimensional d’Alembert equations // Journal of Mathematical Sciences. – 2017. – 220, No. 1 – P. 27–37.
Fedorchuk V. and Fedorchuk V. On classification of symmetry reductions for partial differential equations // Collection of the works dedicated to 80th of anniversary of B.J. Ptashnyk, Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine, Lviv, 2017. – P. 241–255.
Prokip V.M. Triangularization of a pair of matrices over the domain of principal ideals with minimal quadratic polynomials. // Journal of Mathematical Sciences. – 2017. – 222, No. 1 – P.50–55.
Prokip V.M. On divisibility with a remainder of matrices over a principal ideal domain // Mat. Metody Fiz.–Mekh. Polya. – 2017. – 60, № 2. – P.41–50 (in Ukrainian).
Prokip V.M. The Structure of Symmetric Solutions of the Matrix Equation AX=B over a Principal Ideal Domain // Hindawi. International Journal of Analysis. Volume 2017, Article ID 2867354, 7 pages.

2016

Vasyl Fedorchuk and Volodymyr Fedorchuk., On Classification of Symmetry Reductions for the Eikonal Equation // Symmetry 2016, 8(6), 51; 32pages, doi:10.3390/sym8060051.
Romaniv A. M. The greatest common divisor and lest common multiple of one class of matrices // Visnyk L'viv Univ. Series Mekh.–Math. – 2016. – Issue 82 – P. 186–191. (in Ukrainian).
Shavarovskii B.Z. On invariants and canonical form of matrices of second order with respect to semiscalar equivalence // Bulet. Acad. de Stinte Republ. Moldova. Matematica, (2016), 3 (82), 12–23.
Prokip V.M. The structure of matrices of rank one over the domains of principal ideals with respect to similarity transformation // Mathematical methods and physico–mechanical fields. – 2016. – 59, No 3. – P. 68–76 (in Ukrainian).
Prokip V.M. A structure of symmetric solutions of the matrix equation AX = B over an arbitrary field // Proc. Intern. Geom. Center 2016 9(1), 31–37 (in Ukrainian).

2015

Romaniv A. M. On the Smith normal form of the greatest common divisor of one class of matrices // Applied problems of mechanics and mathematics. – 2015. – Issue 13 – P. 174–181. (in Ukrainian).
Shchedryk V.P. The value of matrix on a system of roots of diagonal elements of matrix and its properties // Applied Problems of Mechanics and Mathematics – 2015. – 13. – P. 187–194 (in Ukrainian)
Shchedryk V.P. Bezout rings of stable range 1.5 // Ukrainian Mathematical Journal. – 2015. – 67, № 6. – P. 960–974.
Romaniv А.М., Shchedryk V.P. Least common right multiple of the matrices with one invariant factor different from the identity. // Journal of Mathematical Sciences. – 2015. – 208. No 3 – P. 344–354.
Ladzoryshyn N.B. The integer solutions of matrix linear unilateral and bilateral equations over quadratic rings // Mathematical methods and physico–mechanical fields. – 2015. – 58, No 2. – P. 47–54.(in Ukrainian).
Shavarovskii B. Z. The semiscalar equivalence and quasi–diagonal similarity of matrices // Mathematical methods and physico–mechanical fields. – 2015. – 58, No 4. – P. 15–26. (in Ukrainian)
Shavarovskii B. Z. The block–diagonal similarity and semisсalar equivalence of polynomial matrices // Mathematical methods and physico–mechanical fields. – 2015. – 58, No 1. – P. 29–41. (in Ukrainian)
Shavarovskii B. Z. On nonsingular solutions of one type of systems of matrix equations // Applied problems of mechanics and mathematics. 2015. – Issue. 13. – P. 11–17. (in Ukrainian)

2014

Ladzoryshyn N., Petrychkovych V. Equivalence of pairs of matrices with relatively prime determinants over quadratic rings of principal ideals // Bul. Acad. Stiinte Repub. Mold. Mat. – 2014. – 76, №3. – P. 38–48.
Romaniv A.M., Shchedryk V.P. Greatest common divisor of matrices one of which is a disappear matrix. // Ukrainian Math. J. – 2014. – 66, No3. – P. 479–485.

Romaniv A.M., Shchedryk V.P. Greatest common divisor of matrices one of which has has one invariant factor different from unity // Ukrainian Mathematical Journal. – 2014. – 66, № 3. – P. 425–430. (in Ukrainian)
Prokip V.M. On the solvability of a system of linear equations over the domain of principal ideals. // Ukr. Mat. Jurn. – 2014. – 66, № 5. – P. 566–570. (in Ukrainian)
Prokip V.M. On the solvability of a system of linear equations over the domain of principal ideals. // Ukrainian Math. J. – 2014. – 66, No 4. – P. 633–637.
Prokip V.M. On solutions of the matrix equation XA₀=A₁ with prescribed characteristic polynomials // Proc. Intern. Geom. Center – 2014. – V.7 (4). – Р.23–33. (in Ukrainian)
Shchedryk V.P. The greatest common divisors and least common multiples of matrices over commutative Bezout domains // Applied problems of mechanics and mathematics. – 2014. – V. 12. – P. 30–36. (in Ukrainian)
Fedorchuk V.I. On invariant solutions of some five–dimensional d’Alembert equations // Mat. Metodi Fiz.–Mekh. Polya. – 2014. – 57, № 4. – P. 27–34. (in Ukrainian)

2013

Petrychkovych V. M., Ladzoryshyn N.B. Equivalence of pairs of matrices with relatively prime determinants over quadratic rings of principal ideals // Bulet. Acad. de Stinte Republ. Moldova . Matematica. – 2013. – Issue. 11. – P. 63–69. (in Ukrainian).
Fedorchuk V.I. On a partial preliminary group classification of the nonlinear five–dimensional d’Alembert equation. // Journal of Mathematical Sciences, – 2013. – 194, No 2 – P. 166–175.

Ladzoryshyn N.B. On equivalence of pairs of matrices, which determinants are primes powers, over quadratic Euclidean rings. // Carpathian Mathematical Publications. 5 (1), 63–69, (2013). (in Ukrainian).
Shchedryk V.P. Generating set of matrices divisors and its properties // Applied problems of mechanics and mathematics. 2013. – Issue. 11. – P. 70–75. (in Ukrainian).
Prokip V.M. On normal form with respect to semiscalar equivalence of polynomial matrices over a field. // J. Math. Sci., New York 194, No. 2, 149–155 (2013).
Romaniv A.M., Shchedryk V.P. Least common right multiple of the matrices with one invariant factor different from the identity // Mat. Metody Fiz.–Mekh. Polya. – 2013. – 56. – № 4. – P. 67–74. (in Ukrainian)
Shavarovskii B. Z. Semisсalar equivalence of polynomial matrices and triangular similarity of numerical matrices // Applied problems of mechanics and mathematics. 2013. – Issue. 11. – P. 63–69. (in Ukrainian)
Shavarovskii B.Z. On the Triangular Form of a Polynomial Matrix and Its Invariants with Respect to the Semiscalar Equivalence // J. Math. Sci. (N.Y.) – 2013. – 194, No 2. – P. 133–148.

2012

Petrychkovych V. M., Dzhaliuk N.S. The matrix linear unilateral and bilateral equations with two variables over commutative rings. // ISRN Algebra, Volume 2012, Article ID 205478, 14 pages, doi: 10.5402/2012/205478
Petrychkovych V. M., Dzhaliuk N.S. Seniscalar equivalence of polynomial matrices and tne solutions of the Sylvester matrix polynomial equations. Mathematical bulletin of the Shevchenko scientific society. 9, 81–88, (2012) (in Ukrainian).
Petrychkovych V. M., Dzhaliuk N.S. Solutions of matrix polynomial diophantine equation. // Applied problems of mechanics and mathematics. 10, 55 – 61, (2012). (in Ukrainian).
Romaniv A. M., Shchedryk V. P. The greatest common left divisor and the least common right multiple of second order matrices // Mathematical bulletin of the Shevchenko scientific society 9, 269–284, (2012) (in Ukrainian).
Shchedryk V.P. Commutative domains of elementary divisors and some properties of their elements // Ukrainian Mathematical Journal. 2012. – 64, №1. – P. 126–139.
Shavarovskii B.Z. Canonical form of polynomial matrices with all identical elementary divisors // Ukr. Math. J. – 2012. – 64, No. 2. – P. 282–297.
Shavarovskii B.Z. Factorability of polynomial matrices depending on the powers of their elementary divisors // Zh Vychisl. Mat. Mat Fiz– 2012. – 52, № 7. – P. 1171–1184. (in Russian)
Shavarovskii B. Z. On a triangular form of polynomial matrix and its invariants with respect to semiscalar equivalence // Mathematical methods and physico–mechanical fields. – 2012. – 55, No 3. – P. 7–20. (in Ukrainian).
Shavarovskii B. Z. Canonical form for pair of matrices, in which one matrix has pairwise relatively prime elementary divisors of degree at most two // Applied problems of mechanics and mathematics. 2012. – Issue. 10. – P. 62–70. (in Ukrainian).
Prokip V.M. Diagonalizability of matrices over a principal ideal domain. // Ukr. Math. J. 64, No. 2, 316–323 (2012).
Fedorchuk V.M., Fedorchuk V.I. Invariant operators of four–dimensional nonconjugate subalgebras of the Lie algebra of the Poincaré group P(1,4) // Journal of Mathematical Sciences – 2012. – 181, №3. – P. 305—319.
Fedorchuk V.M, Fedorchuk V.I. Classification of non–singular manifolds in the space M(1,4) × R(u) invariant under one– and two– dimensional noncon–jugate subalgebras of the Lie algebra of the Poincaré group P(1,4) // Scientific bulletin of Uzhorod university. Series Physic. 32, 112 –120, (2012).

2011

Petrychkovych V. M., Dzhaliuk N.S. The matrix diophantine equations AX+ BY= C // Carpathian Mathematical Publications 3 (2), 49–56, (2011). (in Ukrainian).
Romaniv A. M. Monic divisors of polynomial matrices over infinite field // Algebra Discrete Math. – 2011. – 12, No 2. – P. 94–101.
Romaniv A. M. Monic divisors with canonical diagonal form of polynomial matrices over infinite field // Matematychni Studii. – 2011. – Vol 36, No 1. – P. 12–20. (in Ukrainian).
Shchedryk V. On the one–side equivalence of matrices with given canonical diagonal form // Algebra and Discrete Mathematics. – 2011. – 12, №2. – С. 102–111.
Shchedryk V.P. On the Interdependence between Invariant Multipliers of a Block–Triangular Matrix and Its Diagonal Blocks // Mathematical Notes. – 2011. – 90, №4. – С. 584 – 596.
Shavarovskii B. Z On the similarity of matrix polynomials of simple structure // Applied problems of mechanics and mathematics. 2011. – I. 9. – P. 74–81. (in Ukrainian).
Shavarovskii B.Z. Decomposability of matrix polynomials with commuting coefficients into a product of linear factors // Ukr. Math. J. – 2011. – 62, No. 8. – P. 1295–1306.
Fedorchuk V. M. and Fedorchuk V.I. Invariant operators for four–dimensional nonconjugate subalgebras of the Lie algebra of the Poincaré group P(1,4). // Journal of Mathematical Sciences, – 2012. – 182, No 3 – P. 305–319.

2010

Petrychkovych V. M., Dzhaliuk N.S. Parallel factorizations of matrices over rings and their connections. // Applied problems of mechanics and mathematics. 2010. – I. 8. – P. 7–17. (in Ukrainian).
Romaniv A. M. Unital divisors with one invariant factor of polynomial matrices // Mathematical methods and physico–mechanical fields. – 2010. – 53,No 4. – P. 35–43. (in Ukrainian).
Shchedryk V.P. On invariant factors of block–triangular matrices and their diagonal blocks // Dopovidi NAS of Ukraine. – 2010, № 6. – с. 34–36 (in Ukrainian).
Fedorchuk V.M. and Fedorchuk V.I. On the equivalence of functional bases of differential invariants of nonconjugate subgroups of local Lie groups of point transformations. // Journal of Mathematical Sciences, – 2010. – 170, No 5 – P. 588–593.

2009

Petrychkovych V. M., Zabavsky B.V. On the stable range of matrix rings Ukrainian Mathematical Journal 61 (11), 1853–1857, (2009).
Petrychkovych V. M On solvents of matrix polynomial equations and their number. // Applied problems of mechanics and mathematics. 2009. – I. 7. – P. 52–56. (in Ukrainian).
Shchedryk V. Factorization of matrices over elementary divisor domain // Algebra and Discrete Mathematics. – 2009. – №2. – P. 79–99.
Shavarovskii B.Z. Similarity Transformations of Decomposable Matrix Polynomials and Related Questions // Computational Mathematics and Mathematical Physics. V. 49, No. 9, 2009. P. 1469–1482.

2008

Fedorchuk V.M. and Fedorchuk V.I., On functional bases of the first–order differential invariants for nonconjugate subgroups of the Poincaré group P(1,4) // Annales Academiae Paedagogicae Cracoviensis, Studia Mathematica VII (2008), 41–50.
Romaniv A. M., Shchedryk V. P. On nonassociated and monic divisors of polynomial matrices // Applied problems of mechanics and mathematics. – 2008. – Issue. 6. – P. 72–79.
Shchedryk V.P. Some invariants of transforming matrices // Mathematical studies– 2008. – 29. – P. 121–126 (in Ukrainian).

2007

Fedorchuk V.M. and Fedorchuk V.I. On invariant operators of low–dimension nonconjugate subalgebras of the Lie algebra of the Poincaré group P(1,4). (Ukrainian) // Mat. Metodi Fiz.–Mekh. Polya. – 2007. – 50, N 1. – P. 16–23.
Petrychkovych V. M., Dzhaliuk N.S. Factorization of block diagonal and block triangular matrices over principal ideal rings (with Dzhaliuk N.S). Mathematical bulletin of the Shevchenko scientific society. 4, 79–89, (2007).
Shavarovskii B.Z. Classes of Factorable and Unfactorable Polynomial Matrices and Their Relative Position // Doklady Mathematics . – 2007 – 75, №.2. – Р. 318–321.
Shavarovskii B.Z. On the Similarity of Matrices of Even Order. // Mathematical Notes. – 81, no. 3. – 2007. – P. 392–407.
Shavarovskii B.Z. Finding a Complete Set of Solutions or Proving Unsolvability for Certain Classes of Matrix Polynomial Equations with Commuting Coefficients // Computational Mathematics and Mathematical Physics. – 2007. – 47, №. 12. – Р. 1902–1911.
Shavarovskii B.Z. Multiplicative Structure of a Polynomial Matrix Depending on Its Elementary Divisors// Doklady Mathematics , 2007. – 76, №3. – Р. 843–847.

2006

Fedorchuk V.M. and Fedorchuk V.I., First–order differential invariants of the splitting subgroups of the Poincaré group P(1,4) // Universitatis Iagellonicae Acta Mathematica, 2006, Fasciculus XLIV, 35–44.
Fedorchuk V.M. and Fedorchuk V.I. On classification of low–dimensional nonconjugate subalgebras of the Lie algebra of the Poincaré group P(1,4). (Ukrainian) // Proceedings of the Institute of Mathematics of NAS of Ukraine, 2006, 3, N 2, 302–308.
Petrychkovych V. M., Zelisko V.R., Ladzoryshyn N.B. On equivalence of matrices over quadratic Euclidean rings Applied problems of mechanics and mathematics. 4, 16 – 21, (2006). (in Ukrainian).
Shavarovskii B.Z. Solvability of Matrix Equations in Rings of Quasi–Diagonal Matrices and Similarity of Matrix Polynomials // Computational Mathematics and Mathematical Physics. – 46. №. 8. – 2006. – P. 1283–1292.

2005

Fedorchuk V.M. and Fedorchuk V.I. On functional bases of first–order differential invariants of continuous subgroups of the Poincaré group P(1,4). (Ukrainian) // Mat. Metodi Fiz.–Mekh. Polya. – 2005. – 48, N 4. – P. 51–58.
Petrychkovych V. M. Multiplicities of characteristic roots, degrees of elementary divisors and factorization of polynomial matrices. Mat. Metody Fiz.–Mekh. Polya 48, (2), 7–17, (2005).
Petrychkovych V. M. On solutions of matrix polynomial equations and the similarity of matrices. Mat. Metodi Fiz.–Mekh. Polya. 48, ( 4), 14–19, (2005).
Petrychkovych V. M., Dzhaliuk N.S. On solution of matrix polynomial equations and on similarity of matrices. Mat. Metody Fiz.–Mekh. Polya. 48, ( 4), 14 – 19, (2005).
Shchedryk V.P. Some determinant properties of primitive matrices over Bezout B–domain // Algebra and Discrete Mathematics. – 2005. – №2. –P. 46–57.

2004

Vasyl Fedorchuk and Volodymyr Fedorchuk, On the Differential First – Order Invariants of the Non–Splitting Subgroups of the Poincaré group P(1,4) // Proceedings of Institute of Mathematics of NAS of Ukraine, 2004, 50, Part 1, 85–91.
Vasyl M. Fedorchuk and Volodymyr I. Fedorchuk, On the differential first–order invariants for the non–splitting subgroups of the generalized Poincaré group P(1,4) // Annales Academiae Paedagogicae Cracoviensis, Studia Mathematica IV (2004), Folia 23, 65–74.
Petrychkovych V. M. Generalized equivalence of collections of matrices and common divisors of matrices. Algebra and Discrete Mathematics. 2, 84 – 91, (2004).
Petrychkovych V. M., Zelisko V.R. On common divisors of polynomial matrices. Applied problems of mechanics and mathematics. 2, 56 – 60, (2004).
Petrychkovych V. M. On divisibility and factorization of matrices. Mat. Stud. 22, ( 2), 115–120 (2004).
Shavarovskii B.Z. On Some ‘Tame” and “Wild” Aspects of the Problem of Semiscalar Equivalence of Polynomial Matrices // Mathematical Notes. – 76, no. 1. – 2004. – P. 111–123.
Shavarovskii B.Z. Solving a System of Linear Homogeneous Two–Sided Matrix Equations in Two Unknowns. // Computational Mathematics and Mathematical Physics. – 44. № 11. – 2004. – P. 1853–1866.

2003

Fedorchuk V.M. and Fedorchuk V.I, On new differential equations of the first order in the space M(1,4)× R(u) with non–trivial symmetries // Annales Academiae Paedagogicae Cracoviensis, Studia Mathematica III (2003), Folia 16, 49–53.
Petrychkovych V. M., Standard form of pairs of matrices with respect to generalized equivalence. Visnyk Lviv. Univ., Ser. Mech–Math. 61, 148 – 155, (2003).
Petrychkovych V. M., Komarnytsky N.Ya. Structure–theoretical properties of matrices finitely generated principal ideal rings. Mat. Metody Fiz.–Mekh. Polya. 46, (2), 7 – 21, (2003).
Shchedryk V. On decomposition of complete linear group into product of some its subgroups // Visnyk Lviv. Univ., Ser. Mech.–Math. – 2003. – 61. – P. 184–190.
Shavarovskii B.Z. A Complete System of Invariants with Respect to Similarity for Pairs of Matrices of Even Order with Characteristic Matrix of Special Smith form // Mathematical Notes. – 73, no. 6. – 2003. – P. 871–888.
Shavarovskii B.Z. On a Method for Reducing a Pair of Matrices to Block Diagonal Form by a Similarity Transformation // Computational Mathematics and Mathematical Physics . – 43. № 9. – 2003. – P. 1231–1240.

2002

Fedorchuk V.M. and Fedorchuk V.I. On first–order differential invariants for splitting subgroups of the generalized Poincaré group P(1,4). (Ukrainian) // Dopov. Nats. Akad. Nauk Ukr. – 2002, N 5. – P. 36–42.
Fedorchuk V, On invariants of continuous subgroups of the generalized Poincaré group P(1,4) // Universitatis Iagellonicae Acta Mathematica, Fasciculus XL, 2002, 197–205.
Petrychkovych V. M., Dzhaliuk N.S. On common monic divisors of polynomial matrices with given canonical diagonal form, Mat. Metody Fiz.–Mekh. Polya. 45, ( 3), 7 – 13, (2002).
Shchedryk V.P. One class of divisors of matrices over commutative elementary divisor domain // Mathematical studies. – 2002. – 17, №1. – P. 23–28 (in Ukrainian)
Shchedryk V.P. Non associated matrix with standard Ф–skeleton // Math. Method. i Fiz. Mekh. Polia. – 2002. – 45, №3. – P. 32–44 (in Ukrainian).

2001

Fedorchuk V.M. and Fedorchuk V.I. Differential invariants of the first order of splitting subgroups of the generalized Poincaré group P(1,4). (Ukrainian) // Mat. Metodi Fiz.–Mekh. Polya. – 2001.– 44, N 1. – P. 16–21.
Fedorchuk V.I. First–order differential equations in the space M(1,4)×R(u) with nontrivial symmetry groups. (Ukrainian) // Group and analytic methods in mathematical physics (Ukrainian), 283–292, Pr. Inst. Mat. Nats. Akad. Nauk Ukr. Mat. Zastos., 36, Natsional. Akad. Nauk Ukraini, Inst. Mat., Kiev, 2001.
Fedorchuk V.I. On second–order differential equations in the space M(1,4)×R(u) with nontrivial symmetry groups. (Ukrainian) // Mat. Metodi Fiz.–Mekh. Polya. – 2001. – 44, N. 4. – С. 52–56.

2000

Fedorchuk V.M. Invariants of subgroups of the generalized Poincaré group P(1,4). (Ukrainian) // Mat. Metodi Fiz.–Mekh. Polya. – 2000. – 43, N 2. – P. 64–69.
Petrychkovych V. M. Generalized equivalence of pairs of matrices. Linear and Multilinear Algebra. 48, (2), 179 – 188, (2000).
Petrychkovych V. M. Reducibility of pairs of matrices by generalized equivalent transformations to triangular and diagonal forms and their applications. Mat. Metody Fiz.–Mekh. Polya. 43, ( 2), 15 – 22, (2000).
Shchedryk V.P. Ф–skeleton of matrices and its properties // Math. Method. i Fiz. Mekh. Polia, –2000. – 43, № 2. – P. 45–51 (in Ukrainian).
Shchedryk V.P. On transforming matrices over some Bezout domains // Math. Method. i Fiz. Mekh. Polia – 2000. – 43, № 1. – С. 36–44 (in Ukrainian).
Shavarovskii B.Z. Factorable polynomial matrices // Mathematical Notes. – 2000. – 68, №4. – С. 507–518.
Shavarovskii B.Z. On Semiscalar and Quasidiagonal Equivalences of Matrices // Ukr. Math. J. – 2000. – 52, No. 10. – P. 1638–1643.

1999

Fedorchuk V.M., Fedorchuk I.M. and Fedorchuk V.I. Symmetry reduction of the five–dimensional Dirac equation. (Ukrainian) // Dopov. Nats. Akad. Nauk Ukr. Mat. Prirodozn. Tekh. Nauki, 1999, N 9, P. 24–29.

Petrychkovych V. M. On the parallel factorization of matrices over principal ideal rings Journal of Mathematical Sciences, New York, 96, (2), 3022–3025, (1999).

Shavarovskii B.Z. Decomposition of polynomial matrices into a direct sum of triangular summands // Ukr. Math. J. – 1999. – 51, No. 8. – P. 1291–1295.

Shavarovskii B.Z. On decomposition of polynomial matrices into direct sum of matrices of smaller order // Reports of the Academy of Sciences of Ukraine. – 1999. – №4. – P. 49–53.

1998

Shchedryk V.P. Structure and properties of matrices divisors over commutative elementary divisor domains // Mathematical studies. – 1998. – 10. –№2. – С. 115–120 (in Ukrainian).

Shavarovskii B.Z. Reduction of matrices of equivalent transformations and similarity transformations // Mathematical Notes. – 1998. – 64, №5. – P. 663–673.

1997

Petrychkovych V. M. A criterion of diagonalizability of a pair of matrices over the ring of principal ideals by common row and separate column transformations.Ukr. Math. J. 49, (6), 963–965, (1997).

Petrychkovych V. M. Generalized equivalence of pairs of matrices. . Mat. Stud. 8, (2), 147 – 152, (1997).

1996

Fedorchuk V.M. Symmetry reduction and some exact solutions of a nonlinear five–dimensional wave equation. (Ukrainian) // Ukrain. Mat. Zh. – 1996. – 48, N 4. – P. 574–577; translation in Ukrainian Math. J., 48 (1996), no. 4, 636–640 (1997).

1995

Fedorchuk V. Symmetry Reduction and Exact Solutions of the Euler–Lagrange–Born–Infeld, the Multidimensional Monge–Ampère and the Eikonal Equations // J. Nonlinear Math. Phys. – 1995.– v. 2, N 3–4. – P. 329–333.

1993

Petrychkovych V. M. Decomposition of polynomial matrices into factors with prescribed canonical diagonal forms Journal of Soviet Mathematics. 64 (5), 1129–1131, (1993).

Petrychkovych V. M. Semiscalar equivalence and the Smith normal form of polynomial matrices Journal of Soviet Mathematics. 66, No.1, 2030–2033, (1993).

1992

Petrychkovych V. M. Parallel factorizations of polynomial matrices. Ukrainian Mathematical Journal 44 (9), 1123–1127, (1992).

1991

Fedorchuk V.M., Fedorchuk I.M. and Leibov O.S. Reduction of the Born–Infeld, the Monge–Ampère and the eikonal equation to linear equations. (Russian) // Dokl. Akad. Nauk Ukrainy. – 1991, N 11. – P. 24–26.

1990

Petrychkovych V. M. Semiscalar equivalence and the factorization of polynomial matrices Ukrainian Mathematical Journal. 42, (5), 570–574, (1990).

1986

Petrychkovych V. M., Prokip V.M. Factorization of polynomial matrices over arbitrary fields. Ukrainian Mathematical Journal. 38, (4), 409–412, (1986).

1985

Fushchich W.I., Barannik A.F., Barannik L.F. and Fedorchuk V.M. Continuous subgroups of the Poincaré group P(1,4) // J. Phys. A: Math. Gen. – 1985. – 18, N 14. – P. 2893–2899.

Petrychkovych V. M. Cell–triangular and cell–diagonal factorizations of cell–triangular and cell–diagonal polynomial matrices. Mathematical Notes. 37, 431–435, (1985).

1984

Petrychkovych V. M. Linear divisors and reducibility of polynomial matrices. Ukrainian Mathematical Journal. 36, (2) 176–181, (1984).

1981

Fedorchuk V.M. Nonsplitting subalgebras of the Lie algebra of the generalized Poincaré group P(1,4). (Russian) // Ukrain. Mat. Zh. – 1981. – 33, N 5. P. 696–700. English translation: Ukrainian Math. J. 33 (1981), no. 5, 535–538 (1982).

Petrychkovych V. M. Problems of the factorization of matrix polynomials. Mat. Metody Fiz.–Mekh. Polya 14, 19–26, (1981).

1980

Petrychkovych V. M. On the number of solutions of a matrix equation. Mat. Metody Fiz.–Mekh. Polya 12, 56–58, (1980).

1979

Fedorchuk V.M. Splitting subalgebras of the Lie algebra of the generalized Poincaré group P(1,4) . (Russian) // Ukrain. Mat. Zh. – 1979. – 31, N 6. – P. 717–722. English translation: Ukrainian Math. J., 31 (1979), no. 6, 554–558 (1980).

Petrychkovych V. M. Absolute expansibility of matrix polynomials Mat. Metody Fiz.–Mekh. Polya 9, 37–41, (1979).

1978

Petrychkovych V. M., Kazimirs' kii P. S. Decomposability of polynomial matrices into a product of linear factors Mat. Met. Fiz.–Mekh. Polya. 8, 3 – 9, (1978).

1977

Petrychkovych V. M., Kazimirs' kii P. S. On the equivalence of polynomial matrices Theoretical and Applied Problems of Algebra and Differential Equations. 61 – 66, (1977).

List of Conference Proceedings:

1. Nataliia Ladzoryshyn, Vasyl' Petrychkovych. (z,k)-equivalence of matrices over quadratic rings // The 15th Ukraine Algebraic Conference, July 8-12, 2025, Ivan Franko National University of Lviv. Book of Abstract - P. 65. - [Electronic resource]. - Access mode: (https://xvuac.mmf.com.ua/images/pdf/abstracts.pdf )

2. Nataliia Ladzoryshyn, Vasyl' Petrychkovych, Halyna Zelisko. A Sylvester-type matrix equation over some quadratic rings // XII International Skorobohatko mathematical conference, September 23-25, 2025, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2025. - P. 52. - [Electronic resource]. - Access mode: (http://www.iapmm.lviv.ua/conf_skorob2025/documents/2025tezy.pdf )

3. Prokip Volodymyr. On symmetric solutions of the matrix equation AX = B over a Bezout domain // Інноваційні цифрові методи в галузі освіти та досліджень. Збірник тез доповідей. Берегове, 27-28 березня 2025 року. P.146-148.

4. Prokip V. On the uniqueness of solutions of a matrix equation AX - Y B = C over the ring of integers // 15th Ukraine Algebra Conference, July 8-12, 2025, Lviv, Ukraine. Book of Abstracts: Ivan Franko National University of Lviv, Ukraine. - 123 p. - P. 84. - https://xvuac.mmf.com.ua/index.php/abstracts

5. Rostyslava V. Kolyada, Orest M. Mel'nyk, Volodymyr M. Prokip On solutions of matrix equation A(λ)X(λ)+Y(λ)B(λ)=C(λ) // 15th Ukraine Algebra Conference, July 8-12, 2025, Lviv, Ukraine. Book of Abstracts: Ivan Franko National University of Lviv, Ukraine. - 123 p. - P. 61. - https://xvuac.mmf.com.ua/index.php/abstracts

6. Volodymyr Prokip On solutions of the matrix equation AX + YB = C over Bezout domain // Ukraine Mathematics Conference "At the End of the Year 2025," December 18-19, 2025, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Book of Abstracts. - 133 с. - P. 47. - https://drive.google.com/file/d/1LGUD-of4DUq2LiKYbN233claruwbGIj4/view

7. Fedir Sokhatsky Quasigroups and loops up to order 5 // Conference Quasigroups and Related Systems, Moldova State University. Book of abstracts. Chisninau, July 2-4, 2025. P. 41-45.

8. Fedir Sokhatsky, Bohdan Buniak Formulas for determining some quasigroups of order 8 // Conference Quasigroups and Related Systems, Moldova State University. Book of abstracts. Chisninau, July 2-4, 2025. P. 45-47.

9. Fedir Sokhatsky, Bohdan Buniak About SA loops of order 10 // International Conference Mathematics & Information Technologies: Research And Education (MITRE-2025), Mathematical Week in Chisinau dedicated to the centenary of Valentin Belousov (1925-1988), Chisninau, 2025 Moldova. Abstracts. P.12

10. Fedir Sokhatsky, Bohdan Buniak Semisymmetric Anticommutative Loops up to order 15 // 15th Ukraine Algebra Conference, July 8-12, 2025, Lviv, Ukraine. Book of Abstracts: Ivan Franko National University of Lviv, Ukraine. - 123 p. - P. 104. - https://xvuac.mmf.com.ua/index.php/abstracts

11. Fedir Sokhatsky, Halyna Krainichuk, Volodymyr Luzhetsky Canonical and matrix figuration of quasigroups of order 4 // 15th Ukraine Algebra Conference, July 8-12, 2025, Lviv, Ukraine. Book of Abstracts: Ivan Franko National University of Lviv, Ukraine. - 123 p. - P. 105. - https://xvuac.mmf.com.ua/index.php/abstracts

12. Fedir Sokhatsky The simplest algorithm for listing all permutations // Ukraine Mathematics Conference "At the End of the Year 2025," December 18–19, 2025, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Book of Abstracts. – 133 с. – P. 53. – https://drive.google.com/file/d/1LGUD-of4DUq2LiKYbN233claruwbGIj4/view

13. Volodymyr Shchedryk Non-classical canonical form of matrices with respect to one-sided transformations // Ukraine Mathematics Conference "At the End of the Year 2025," December 18-19, 2025, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Book of Abstracts. - 133 с. - P. 52. - https://drive.google.com/file/d/1LGUD-of4DUq2LiKYbN233claruwbGIj4/view

14. Shchedryk V. General linear group and idempotent matrices over a field // International scientific and practical conference "Innovative Digital Methods in Education and Research", Berehove, 27-28 March 2025, Book of Abstracts P. 153.

15. Shchedryk V. Canonical form of low-dimensional matrices with respect to one-sided transformations // The 15th Ukraine Algebra Conference, L'viv, July 8-12, 2025, Book of Abstracts P. 100.

16. Bohdan Shavarovskii Oriented by characteristic roots polynomial matrices of simple structure // 15th Ukraine Algebra Conference, July 8-12, 2025, Lviv, Ukraine. Book of Abstracts: Ivan Franko National University of Lviv, Ukraine. - 123 p. - P. 99. - https://xvuac.mmf.com.ua/index.php/abstracts

17. Bohdan Shavarovskii Reduction of a matrix oriented by characteristic roots to a form with given characteristics // XII International Skorobohatko mathematical conference, September 23 - 25, 2025, Lviv, Ukraine. Abstracts: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, Lviv, 2025. - 107 p. - P. 92. - http://www.iapmm.lviv.ua/conf_skorob2025/documents/2025tezy.pdf

18. Romaniv A. On reduction of invertible matrices to simple forms. // The 15th Ukraine Algebra Conference, July 8–12, 2025, Lviv, Ukraine. Book of Abstracts. – Ivan Franko National University of Lviv, 2025. – 123 p. (p. 90).

19. Romaniv A. On Bezout rings of stable range 1 // XII International Skorobohatko Mathematical Conference September 23–25, 2025, Lviv, Ukraine. Abstracts. – Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine, 2025. – 107 p. (p. 84).

20. Volodymyr Fedorchuk On Symmetry Reduction of The (1 + 3)-Dimensional Monge-Ampere Equation to Algebraic Equations // XII International Skorobohatko mathematical conference, September 23 – 25, 2025, Lviv, Ukraine. Abstracts: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, Lviv, 2025. – 107 p. – P. 27. – http://www.iapmm.lviv.ua/conf_skorob2025/documents/2025tezy.pdf

21. Volodymyr Fedorchuk, On partial preliminary group classification of some class of (1+3)-dimensional Monge-Ampere equations. Three-dimensional Abelian Lie algebras // International online workshop "Symmetry and Integrability of Equations of Mathematical Physics", Kyiv, December 26, 2025, https://www.imath.kiev.ua/~appmath/Abstracts2025/Fedorchuk.pdf

22. Nataliia Dzhaliuk, Vasyl’ Petrychkovych Methods for solving Sylvester-type matrix equations and the investigation of the structure of their solutions // 15th Ukraine Algebra Conference, July 8–12, 2025, Lviv, Ukraine. Book of Abstracts: Ivan Franko National University of Lviv, Ukraine. – 123 p. – P. 40. – https://xvuac.mmf.com.ua/index.php/abstracts

23. Nataliia Dzhaliuk, Vasyl’ Petrychkovych Polynomial matrices, their factorizations and differential equations in investigations of Lopatyns’kii, Kazimirs’kii and modern scientists // XII International Skorobohatko mathematical conference, September 23 – 25, 2025, Lviv, Ukraine. Abstracts: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, Lviv, 2025. – 107 p. – P. 24–25. – http://www.iapmm.lviv.ua/conf_skorob2025/documents/2025tezy.pdf

24. Volodymyr Shchedryk Description of the low-dimensional general linear group and idempotent matrices over a field // Ukraine Mathematics Conference "At the End of the Year 2024," December 16–18, 2024, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Book of Abstracts. – 92 с. – P. 46. – https://sites.google.com/knu.ua/aey2024/abstracts

25. Shchedryk V. A parametric description general linear group of degree 3 over a field// International conference dedicated to the 145th anniversary of the birth of Hans Hahn, September 23–27, 2024, Chernivtsi. – Chernivtsi: Yuriy Fedkovych Chernivtsi National University, 2024. – 184 p. – P. 172. – https://hahn.chnu.edu.ua/media/odbldmui/book-of-abstracts.pdf

26. Nataliia Dzhaliuk, Vasyl’ Petrychkovych Solutions of a given degree for the matrix linear bilateral polynomial equations // Ukraine Mathematics Conference "At the End of the Year 2024," December 16–18, 2024, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Book of Abstracts. – 92 с. – P. 23. – https://sites.google.com/knu.ua/aey2024/abstracts

27. Dzhaliuk Nataliia, Sylvester-type Matrix Polynomial Equations and Solutions of a Prescribed Degree // 3rd International Symposium on Current Developments in Fundamental and Applied Mathematics Sciences 02-05 September 2024, Istanbul, Turkey. Abstract and Full Text Symposium Book. ISBN 978-625-97879-0-9. – 290 p. – P. 109. –https://atabulut.atauni.edu.tr/atabulut/index.php/s/bUAy5E7j1iZOfgX

28. Dzhaliuk Nataliia, Petrychkovych Vasyl' On uniqueness of Sylvester-type matrix polynomial equation's solution // International conference dedicated to the 145th anniversary of the birth of Hans Hahn, September 23–27, 2024, Chernivtsi. – Chernivtsi: Yuriy Fedkovych Chernivtsi National University, 2024. – 184 p. – P. 126–127. – https://hahn.chnu.edu.ua/media/odbldmui/book-of-abstracts.pdf

29. Andrii Romaniv Conditions for divisibility of common multiples of matrices // Ukraine Mathematics Conference "At the End of the Year 2024," December 16–18, 2024, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Book of Abstracts. – 92 с. – P. 43. – https://sites.google.com/knu.ua/aey2024/abstracts

30. Andrii Romaniv. The Structure of the Greatest Common Divisor of Matrices Over Elementary Divisor Domains // 3rd International Symposium on Current Developments in Fundamental and Applied Mathematics Sciences 02-05 September 2024, Istanbul, Turkey. Abstract and Full Text Symposium Book. ISBN 978-625-97879-0-9. – 290 p. – P. 117. –https://atabulut.atauni.edu.tr/atabulut/index.php/s/bUAy5E7j1iZOfgX

31. Romaniv Andrii. Common multiples of third-order matrices over commutative Bezout domains of stable rank 1.5. // International conference dedicated to the 145th anniversary of the birth of Hans Hahn, September 23–27, 2024, Chernivtsi. – Chernivtsi: Yuriy Fedkovych Chernivtsi National University, 2024. – 184 p. – P. 93. – https://hahn.chnu.edu.ua/media/odbldmui/book-of-abstracts.pdf (in Ukrainian)

32. Vasyl Fedorchuk, Volodymyr Fedorchuk. On the construction and classification of the common invariant solutions for the (1 + 3)-dimensional Euler-Lagrange-Born-Infeld and homogeneous Monge-Ampere equations // International scientific online conference «Algebraic and geometric methods of analysis», May 27-30, 2024, Odesa, Ukraine. – P. 33–34. https://imath.kiev.ua/~topology/conf/agma2024/abstracts/texts/fedorchuk/fedorchuk.pdf

33. Vasyl Fedorchuk, Volodymyr Fedorchuk, On the construction of the common invariant solutions for some P(1,4)-invariant partial differential equations // International conference dedicated to the 145th anniversary of the birth of Hans Hahn, September 23–27, 2024, Chernivtsi. – Chernivtsi: Yuriy Fedkovych Chernivtsi National University, 2024. – 184 p. – P. 129. https://hahn.chnu.edu.ua/media/3cln1ko5/book-of-abstracts.pdf

34. Prokip V.M. About square roots of matrices over factorial domains // International Scientific Conference Algebraic and Geometric Methods of Analysis. Odesa, Ukraine May 27-30, 2024. Book of Abstracts. P. 102–103.

35. Prokip V. On solvability of the matrix equation AX+YB=C over principal ideal domains // VІI International scientific-practical conference "Modeling, control and information technology" November 7-9 2024, Rivne.– P. 264–267. https://doi.org/10.31713/MCIT.2024.081

36. Volodymyr M. Prokip Roth’s theorem and equivalence of matrices // Ukraine Mathematics Conference "At the End of the Year 2024," December 16–18, 2024, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Book of Abstracts. – 92 с. – P. 41. – https://sites.google.com/knu.ua/aey2024/abstracts

37. Fedorchuk Vasyl, Fedorchuk Volodymyr. On Classification of Symmetry Reductions for Some P(1,4)–Invariant Partial Differential Equations. Symmetry 2023 – The 4th International Conference on Symmetry (21 – 23 June, 2023, AXA Convention Centre Barcelona, Spain). Program and Abstract Book, p.49. https://symmetry2023.sciforum.net/events_files/766/customs/af8bdf95fc6ca8768ff2b5bbc213cf7f.pdf

38. Shchedryk V., Bovdi V. Adequacy of nonsingular matrices over commutative principal ideal domains // Conference UAE Math Day 2023: March 4th, 2023, Organized by Zayed University, Dubai, UAE. – P.19.

39. Shchedryk V.P. Matrices and related Zelisko groups // Current problems of Mechanics and Mathematics – 2023: Collection of Scientific Papers / Edited by Roman M. Kushnir (Academician of NAS of Ukraine) and Volodymyr O. Pelykh (Corresponding Member of NAS of Ukraine) [Published Online] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine. – 2023. – 454 p. – Access by the link: http://iapmm.lviv.ua/mpmm2023/materials/proceedings.mpmm2023.pdf P. 403–404. – http://iapmm.lviv.ua/mpmm2023/materials/ma10_12.pdf.

40. Shchedryk V. P. A parametric 2–decomposition of small order general linear groups over fields // Ukraine Algebra Conference "At the End of the Year 2023" December 26 27, 2023, Kyiv, Ukraine. Book of abstracts: Kyiv, 2023.

41. Fedorchuk Vasyl, Fedorchuk Volodymyr. Classification of symmetry reductions for some P(1,4)–invariant partial differential equations. // Int. Scientific Conference “Current Problems of Mechanics and Mathematics – 2023” (May 23–25, 2023, Lviv, Ukraine) http://iapmm.lviv.ua/mpmm2023/materials/proceedings.mpmm2023.pdf, P. 376. http://iapmm.lviv.ua/mpmm2023/materials/ma09_02.pdf

42. Fedorchuk Vasyl, Fedorchuk Volodymyr. On partial preliminary group classification of some class of (1 + 3)–dimensional Monge–Ampere equations. Two–dimensional Abelian Lie algebras // International Online Conference Algebraic and geometric methods of analysis (May 29 June 31, 2023, Odesa–Kyiv, Ukraine)} https://imath.kiev.ua/~topology/conf/agma2023/contents/abstracts/texts/fedorchuk/fedorchuk.pdf.

43. Dzhaliuk Nataliia, Petrychkovych Vasyl'. Solvability of matrix equation AX=YB in the ring of block triangular matrices // Current problems of Mechanics and Mathematics – 2023: Collection of Scientific Papers / Edited by Roman M. Kushnir (Academician of NAS of Ukraine) and Volodymyr O. Pelykh (Corresponding Member of NAS of Ukraine) [Published Online] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine. – 2023. – 454 p. – Access by the link: http://iapmm.lviv.ua/mpmm2023/materials/proceedings.mpmm2023.pdf P. 405–406. – http://iapmm.lviv.ua/mpmm2023/materials/ma10_13.pdf (in Ukrainian)

44. Dzhaliuk Nataliia, Petrychkovych Vasyl'. The Sylvester matrix polynomial equation and its solutions // 14th Ukraine Algebra Conference, July 3–7, 2023 Sumy, Ukraine. Book of Abstracts: Sumy State Pedagogical University named after A.S. Makarenko, Sumy, Ukraine. – 150 p. – P. 54

45. Dzhaliuk Nataliia. Linear solutions to the bilateral matrix polynomial equations // Materials of the international scientific conference dedicated to the 55th anniversary of the Faculty of Mathematics and Informatics, September 28–30, 2023 – Chernivtsi: Chernivtsi National University, 2023. – 369 p. – P. 47–48.

46. Dzhaliuk N. S. Solutions of degree s of matrix polyматричного полiномiального рiвняння Cильвестра // XIX International Scientific Mykhailo Kravchuk Conference, dedicated to the 125th anniversary of Igor Sikorsky Kyiv Polytechnic Institute. Proceedings of Nineteenth International Scientific Mykhailo Kravchuk Conference, October 11–12, 2023, Kyiv, Igor Sikorsky Kyiv Polytechnic Institute.– P. 104–105. – https://matan.kpi.ua/en/kravchuk–conf–2023/ (in Ukrainian)

47. Ladzoryshyn Natalija, Petrychkovych Vasyl'. Equivalence of pairs of matrices over thequadratic ring Z[√−2] // Current problems of Mechanics and Mathematics – 2023: Collection of Scientific Papers / Edited by Roman M. Kushnir (Academician of NAS of Ukraine) and Volodymyr O. Pelykh (Corresponding Member of NAS of Ukraine) [Published Online] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine. – 2023. – 454 p. – Access by the link: http://iapmm.lviv.ua/mpmm2023/materials/proceedings.mpmm2023.pdf P. 409−410. – http://iapmm.lviv.ua/mpmm2023/materials/ma10_15.pdf (in Ukrainian)

48. Ladzoryshyn Natalija. (z,k)–equivalence of pairs of matrices over imaginary Euclidean quadratic rings // 14th Ukraine Algebra Conference, July 3–7, 2023 Sumy, Ukraine. Book of Abstracts: Sumy State Pedagogical University named after A.S. Makarenko, Sumy, Ukraine. – 150 p. – P. 81.

49. Ladzoryshyn N.B., Petrychkovych V.М. (z,k)– equivalence of singular matrices over quadratic Euclidean rings // XIX International Scientific Mykhailo Kravchuk Conference, dedicated to the 125th anniversary of Igor Sikorsky Kyiv Polytechnic Institute. Proceedings of Nineteenth International Scientific Mykhailo Kravchuk Conference, October 11–12, 2023, Kyiv, Igor Sikorsky Kyiv Polytechnic Institute.– P. 111 − 112. – https://matan.kpi.ua/uk/kravchuk–conf–2023/ (in Ukrainian)

50. Romaniv Andriy Decomposition of an invertible matrix in the product of two matrices with given properties // Current problems of Mechanics and Mathematics – 2023: Collection of Scientific Papers / Edited by Roman M. Kushnir (Academician of NAS of Ukraine) and Volodymyr O. Pelykh (Corresponding Member of NAS of Ukraine) [Published Online] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine. – 2023. – 454 p. – Access by the link: http://iapmm.lviv.ua/mpmm2023/materials/proceedings.mpmm2023.pdf P. 413–414. – http://iapmm.lviv.ua/mpmm2023/materials/ma10_17.pdf . (in Ukrainian)

51. Romaniv A. Conditions of existence of a matrix which contains a submatrix with given invariant factors// 14th Ukraine Algebra Conference, July 3–7, 2023 Sumy, Ukraine. Book of Abstracts: Sumy State Pedagogical University named after A.S. Makarenko, Sumy, Ukraine. – 150 p. – P. 116.

52. Romaniv A. М. Property of invertible matrix // XIX International Scientific Mykhailo Kravchuk Conference, dedicated to the 125th anniversary of Igor Sikorsky Kyiv Polytechnic Institute. Proceedings of Nineteenth International Scientific Mykhailo Kravchuk Conference, October 11–12, 2023, Kyiv, Igor Sikorsky Kyiv Polytechnic Institute.– P. 120. – https://matan.kpi.ua/uk/kravchuk–conf–2023/. (in Ukrainian)

53. Shavarovskii Bohdan. A complete system of invariants with respect to semi–scalar equivalence for a 3х3–matrix of a simple structure // Current problems of Mechanics and Mathematics – 2023: Collection of Scientific Papers / Edited by Roman M. Kushnir (Academician of NAS of Ukraine) and Volodymyr O. Pelykh (Corresponding Member of NAS of Ukraine) [Published Online] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine. – 2023. – 454 p. – Access by the link: http://iapmm.lviv.ua/mpmm2023/materials/proceedings.mpmm2023.pdf P. 397–398. – http://iapmm.lviv.ua/mpmm2023/materials/ma10_08.pdf

54. Shavarovskii Bohdan.The triangular form of the polynomial 3 × 3–matrix of a simple structure and its invariants with respect to semiscalar equivalence // 14th Ukraine Algebra Conference, July 3–7, 2023 Sumy, Ukraine. Book of Abstracts: Sumy State Pedagogical University named after A.S. Makarenko, Sumy, Ukraine. – 150 p. – P. 123.

55. Prokip V., Melnyk O., Kolyada R. On divisibility of polynomial matrices over a field // Current problems of Mechanics and Mathematics – 2023: Collection of Scientific Papers / Edited by Roman M. Kushnir (Academician of NAS of Ukraine) and Volodymyr O. Pelykh (Corresponding Member of NAS of Ukraine) [Published Online] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of NAS of Ukraine. – 2023. – 454 p. – Access by the link: http://iapmm.lviv.ua/mpmm2023/materials/proceedings.mpmm2023.pdf P. 389–390. – http://iapmm.lviv.ua/mpmm2023/materials/ma10_04.pdf

56. Prokip V. On canonical form of matrices with minimal polynomial m(λ)=(λ–α)2. // 14th Ukraine Algebra Conference, July 3–7, 2023 Sumy, Ukraine. Book of Abstracts: Sumy State Pedagogical University named after A.S. Makarenko, Sumy, Ukraine. – 150 p. – P.109.

57. Prokip V.M. On equivalence of polynomial matrices over a field // Ukraine Mathematics Conference "At the End of the Year 2023," December 26–27, 2023, Taras Shevchenko National University of Kyiv, Institute of Mathematics of NAS of Ukraine, Kyiv, Ukraine, Book of Abstracts. – 61 p. – P. 46. https://sites.google.com/view/aey2023/abstracts

58. Vasyl Fedorchuk, Volodymyr Fedorchuk. On symmetry reduction of the (1+3)–dimensional Inhomogeneous Monge–Ampère equation to algebraic equation. The XVI–th International Conference of Differential Geometry and Dynamical Systems ( DGDS–2022 ), (1 – 4 September 2022) * ONLINE * [Bucharest, Romania]. The booklet of abstracts. p. 10. \\ http://www.mathem.pub.ro/dept/dgds–22/dgds–22.htm

59. Ladzoryshyn N. On the number of standard pairs of pairs of matrices over the ring of Gaussian integers with respect to (z,k)–equivalence // Conference of young Scientists “Pidstryhach reading – 2022”. – L’viv, Ukraine May 25–27, 2022, L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2022/abstracts/Ladzoryshyn.pdf).

60. Romaniv A. On property of invariant factors of the matrix and its submatrix // Conference of young Scientists “Pidstryhach reading – 2022”. – L’viv, Ukraine May 25–27, 2022, L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2022/abstracts/Romaniv.pdf).

61. Prokip V.M. About solvability of the matrix equation AX= B over Bezout domains // In International Scientific Conference Algebraic and Geometric Methods of Analysis. Odesa, Ukraine May 24–27, 2022. P. 39–40.

62. Prokip V.M. A note on a minimal solution of the matrix polynomial equation A(λ)X(λ)–Y(λ)B(λ)=C(λ) // International Algebraic Conference "At the End of the Year" 2022, December 27–28, 2022, Kyiv, Ukraine, Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 73 p. – P. 43

63. Fedorchuk Vasyl, Fedorchuk Volodymyr. On patrial preliminary group classification of some class of (1+3)–dimensional Monge–Ampere equations. One–dimensional Galilean Lie algebras // International Scientific Conference "Algebraic and Geometric Methods of Analysis" Odesa, Ukraine May 24–27, 2022. http://imath.kiev.ua/~topology/conf/agma2022/contents/abstracts/texts/fedorchuk/fedorchuk.pdf – P. 16–17.

64. Fedorchuk Vasyl, Fedorchuk Volodymyr. On patrial preliminary group classification of some class of (1+3)–dimensional Monge–Ampere equations. I. One–dimensional Lie algebras // Workshop "Symmetry and Integrability of Equations of Mathematical Physics" December 23–24, 2022, Kyiv, Ukraine. http://www.imath.kiev.ua/~appmath/Abstracts2022/Fedorchuk.pdf

65. Bovdi V., Shchedryk V. The structure of the Zelisko group elements over factor ring of Bezout domain of stable range 1.5. // The 13th International Algebraic Conference in Ukraine. July 6–9, 2021, Taras Shevchenko National University of Kyiv. Book of Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 94 p. – [Electronic resource]. – Access mode: https://bit.ly/3hcTbKe – P. 25.

66. Petrychkovych V.M., Dzhaliuk N.S. Application of special triangular forms of matrices with respect to equivalences of different types to solving linear matrix equations of Sylvester type // International Algebraic Conference "At the End of the Year" 2021, December 27–28, 2021, Kyiv, Ukraine, Abstracts: Kyiv. – 36 p. – P. 20.

67. Dzhaliuk N., Petrychkovych V. Solutions of matrix linear Sylvester type equations // International Conference in Complex and Functional Analysis dedicated to the memory of Bohdan Vynnytskyi. September 13–16, 2021, Drohobych, Ukraine. Book of Abstracts: Drohobych State Pedagogical University of Ivan Franko, Drohobych, Ukraine. – 67 p. – P. 15.

68. Nataliia Dzhaliuk, Vasyl' Petrychkovych Block matrices, their equivalences and applications // The 13th International Algebraic Conference in Ukraine. July 6–9, 2021, Taras Shevchenko National University of Kyiv. Book of Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 94 p. – [Electronic resource]. – Access mode: https://bit.ly/3hcTbKe – P. 34.

69. Natalija Ladzoryshyn, Vasyl' Petrychkovych. On the number of standard forms of matrices over imaginary Euclidean quadratic rings with respect to the (z,k)–equivalence // The 13th International Algebraic Conference in Ukraine. July 6–9, 2021, Taras Shevchenko National University of Kyiv. Book of Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 94 p. – [Electronic resource]. – Access mode: https://bit.ly/3hcTbKe – P. 45.

70. Romaniv A. Divisibility of invariant factors of two matrices and invariant factors of sum of these matrices // The 13th International Algebraic Conference in Ukraine. July 6–9, 2021, Taras Shevchenko National University of Kyiv. Book of Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 94 p. – [Electronic resource]. – Access mode: https://bit.ly/3hcTbKe – P. 66.

71. Vasyl Fedorchuk, Volodymyr Fedorchuk. On symmetry reduction and some classes of invariant solutions of the (1 + 3)–dimensional homogeneous Monge–Ampère equation. // International On line Conference Algebraic and Geometric Methods of Analysis dedicate to the memory of Yuriy Trokhymchuk (17.03.1928–18.12.2019) (May 25–28, 2021, Odesa, Ukraine). Book of Abstracts. p.36 https://www.imath.kiev.ua/~topology/conf/agma2021/contents/agma2021–abstracts.pdf

72. Vasyl Fedorchuk, Volodymyr Fedorchuk. On symmetry reduction and some classes of invariant solutions of the (1+3)–dimensional inhomogeneous Monge–Ampère equation. // The XV–th International Conference of Differential Geometry and Dynamical Systems (DGDS–2021) 26 – 29 August 2021 * ONLINE * [Bucharest, Romania]. The booklet of abstracts. p.5 http://www.mathem.pub.ro/dept/dgds–21/dgds–21.htm

73. Shavarovskii Bohdan Semiscalar equivalence of polynomial 3–by–3 matrices of simple structure // The 13th International Algebraic Conference in Ukraine. July 6–9, 2021, Taras Shevchenko National University of Kyiv. Book of Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 94 p. – [Electronic resource]. – Access mode: https://bit.ly/3hcTbKe – P. 75.

74. Prokip V. Roth's theorems and similarity of matrices // The 13th International Algebraic Conference in Ukraine. July 6–9, 2021, Taras Shevchenko National University of Kyiv. Book of Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 94 p. – [Electronic resource]. – Access mode: https://bit.ly/3hcTbKe – P. 90.

75. Prokip V. On the matrix equation AX – YB=C over Bezout domains // International Online Conference Algebraic and Geometric Methods of Analysis dedicate to the memory of Yuriy Trokhymchuk (17.03.1928–18.12.2019) (May 25–28, 2021, Odesa, Ukraine). Book of Abstracts. – 172 p. − P. 122. − https://www.imath.kiev.ua/~topology/conf/agma2021/contents/agma2021–abstracts.pdf.

76. Prokip V.M. On solutions of the matrix equation // International Algebraic Conference "At the End of the Year" 2021, December 27–28, 2021, Kyiv, Ukraine, Abstracts: Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. – 35 p. – P. 21.

77. Shchedryk V., Gatalevych A. On adequacy of full matrices over adequate rings // XI International Skorobohatko Mathematical Conference. October 26−30, 2020, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2020. – 130 p. – [Electronic resource]. – Access mode: http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf – P. 35.

78. Andriy Romaniv Divisibility of invariant factors of a matrix and its submatrix // XI International Skorobohatko Mathematical Conference. October 26−30, 2020, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2020. – 130 p. – [Electronic resource]. – Access mode: http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf – P.100.

79. Bohdan Shavarovskii. Canonical form of a reduced matrix with all non–zero sub–diagonal elements // XI International Skorobohatko Mathematical Conference. October 26−30, 2020, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2020. – 130 p. – [Electronic resource]. – Access mode: http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf – P. 106.

80. Prokip V. A note on semiscalar equivalence of polynomial matrices // XI International Skorobohatko Mathematical Conference. October 26−30, 2020, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2020. – 130 p. – [Electronic resource]. – Access mode: http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf – P. 93.

81. Ladzoryshyn N., Petrychkovych V. The standard form of matrices over imaginary Euclidean quadratic rings with respect to (z,k)–equivalence // XI International Skorobohatko Mathematical Conference. October 26−30, 2020, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2020. – 130 p. – [Electronic resource]. – Access mode: http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf – P. 59.

82. Vasyl Fedorchuk, Volodymyr Fedorchuk. On symmetry reduction and some classes of invariant solutions of the (1+3)–dimensional Monge–Ampère equation. The XIV–th International Conference of Differential Geometry and Dynamical Systems ( DGDS–2020 ) 27 –29 August 2020 * ONLINE * [Bucharest, Romania]. List of abstracts, p.2. http://www.mathem.pub.ro/dept/dgds–20/dgds–20.htm

83. Vasyl Fedorchuk, Volodymyr Fedorchuk. On Classification of Symmetry Reductions for Some P(1,4)–Invariant Partial Differential Equations. XI International Skorobohatko Mathematical Conference (October 26–30, 2020, Lviv, Ukraine). Book of Abstracts. p.31. http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf

84. Volodymyr Fedorchuk. On Symmetry Reduction and Invariant Solutions of the Euler–Lagrange–Born–Infeld Equation. XI International Skorobohatko Mathematical Conference (October 26–30, 2020, Lviv, Ukraine). Book of Abstracts. p.32. http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf

85. Bilous A. Stable range of some classes of non commutative rings // XI International Skorobohatko Mathematical Conference. October 26−30, 2020, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2020. – 130 p. – . – [Electronic resource]. – Access mode: http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf – P. 15.

86. Nataliia Dzhaliuk Equivalence of matrices in the ring of the block triangular matrices // XI International Skorobohatko Mathematical Conference. October 26−30, 2020, Lviv, Ukraine. Abstracts: Lviv: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, 2020. – 130 p. – [Electronic resource]. – Access mode: http://www.iapmm.lviv.ua/conf_skorob2020/documents/2020tezy.pdf – P. 29.

87. Bovdi V., Shchedryk V.P. The structure of elements of the Zelisko group // Book of abstracts of the International mathematical conference dedicated to the 60th anniversary of the department of algebra and mathematical logic of Taras Shevchenko National University of Kyiv, 14–17 July 2020, Kyiv, Ukraine. – 93 p. – [Electronic resource]. – Access mode: https://bit.ly/2ZIyqMs – P. 27.

88. V. M. Fedorchuk, V. I. Fedorchuk On some applications of classication of low–dimensional Lie algebras // Book of abstracts of the International mathematical conference dedicated to the 60th anniversary of the department of algebra and mathematical logic of Taras Shevchenko National University of Kyiv, 14–17 July 2020, Kyiv, Ukraine. – 93 p. – [Electronic resource]. – Access mode: https://bit.ly/2ZIyqMs – P. 34.

89. Prokip V.M. On similarity of families of 2x2 matrices over a field // Book of abstracts of the International mathematical conference dedicated to the 60th anniversary of the department of algebra and mathematical logic of Taras Shevchenko National University of Kyiv, 14–17 July 2020, Kyiv, Ukraine. – 93 p. – [Electronic resource]. – Access mode: https://bit.ly/2ZIyqMs – P. 68.

90. Shavarovskii B.Z. Canonical form of a reduced matrix with one zero sub–diagonal element // Book of abstracts of the International mathematical conference dedicated to the 60th anniversary of the department of algebra and mathematical logic of Taras Shevchenko National University of Kyiv, 14–17 July 2020, Kyiv, Ukraine. – 93 p. – [Electronic resource]. – Access mode: https://bit.ly/2ZIyqMs – P. 74.

91. Petrychkovych V.M., Dzhaliuk N.S. Solvability of the matrix Sylvester–type equation in the ring of the block triangular matrices // Book of abstracts of the International mathematical conference dedicated to the 60th anniversary of the department of algebra and mathematical logic of Taras Shevchenko National University of Kyiv, 14–17 July 2020, Kyiv, Ukraine. – 93 p. – [Electronic resource]. – Access mode: https://bit.ly/2ZIyqMs – P. 63.

92. Romaniv A. M. Properties of the invariant factors of the sum of matrices // Book of abstracts of the International mathematical conference dedicated to the 60th anniversary of the department of algebra and mathematical logic of Taras Shevchenko National University of Kyiv, 14–17 July 2020, Kyiv, Ukraine. – 93 p. – [Electronic resource]. – Access mode: https://bit.ly/2ZIyqMs– P. 71.

93. Bilous A. Stable range of some classes of non commutative rings // Conference of young Scientists “Pidstryhach reading – 2020”. – L’viv, Ukraine May 26–28, 2020, L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2020/abstracts/Bilous.pdf).

94. Ladzoryshyn N. (z,k)–equivalence of matrices over the ring of Gaussian integers // Conference of young Scientists “Pidstryhach reading – 2020”. – L’viv, Ukraine May 26–28, 2020, L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2020/abstracts/Ladzoryshyn.pdf).

95. Romaniv A.M., Dzhaliuk N.S. Some connections between invariant factors of matrix and its submatrix // International Scientific Conference Algebraic and Geometric Methods of Analysis, 26–30 may 2020, Odesa, Ukraine. – 131 p. – Access mode: https://www.imath.kiev.ua/~topology/conf/agma2020/agma–2020–abstracts/agma2020–theses.pdf – P. 57.

96. Prokip V. On similarity of two families of matrices over a field // International Scientific Conference Algebraic and Geometric Methods of Analysis, 26–30 may 2020, Odesa, Ukraine. – 131 p. – Access mode: https://www.imath.kiev.ua/~topology/conf/agma2020/agma–2020–abstracts/agma2020–theses.pdf – P. 55.

97. Prokip V.М. On the square roots of matrices over the domain of principal ideals // PSC–IMFS–16, 06–07 February 2020, L’viv, Ukraine, С.65–66. (in Ukrainian)

98. Shavarovskii B.Z. Semiscalar equivalence of one class of 3–by–3 matrices // XII International Algebraic Conference in Ukraine dedicated to the 215th anniversary of V. Bunyakovsky, July 02–06, 2019, Vinnytsia, Ukraine. – 142 p. – P. 101–102.

99. Shchedryk V. On great common divisors and least common multiple of matrix equation solutions // XII International Algebraic Conference in Ukraine dedicated to the 215th anniversary of V. Bunyakovsky, July 2–6, 2019,Vinnytsia, Ukraine. Abstracts. – Vinnytsia:Vasyl’ Stus Donetsk University, 2019. – 142 p. – P. 102.

100. Nataliia Dzhaliuk. Solutions of the Sylvester matrix equation with triangular coefficients // The XII International Algebraic Conference in Ukraine dedicated to the 215th anniversary of V.Bunyakovsky. July 02–06, 2019, Vinnytsia, Ukraine. Abstracts/ Vinnytsia: Vasyl' Stus Donetsk National University, 2019. – 142 p. – P. 28–29. http://jiac.donnu.edu.ua/article/view/6933/6964

101. Ladzoryshyn N., Petrychkovych V. (z,k)–equivalence of matrices over Euclidean quadratic rings and solutions of matrix equation AX+YB=C // Book of abstracts of the XII International Algebraic Conference in Ukraine dedicated to the 215th anniversary of V. Bunyakovsky, July 02 – 06, 2019, Vinnytsia, 2019. – P. 63–64.

102. Ladzoryshyn N. Solutions of the matrix equation AX+BY=C over Euclidean quadratic rings // Conference of young Scientists “Pidstryhach reading – 2019”.– Lviv, Ukraine, May 27–29, 2019, Lviv. – [Electronic resource]. – Access mode: (http://iapmm.lviv.ua/chyt2019/abstracts/Ladzoryshyn.pdf).

103. Prokip V. On similarity of tuples of matrices over a field // XII International Algebraic Conference in Ukraine dedicated to the 215th anniversary of V. Bunyakovsky, July 2–6, 2019,Vinnytsia, Ukraine. Abstracts. – Vinnytsia:Vasyl’ Stus Donetsk University, 2019. – 142 p. – P. 90–91.

104. Romaniv A. Reduction of nonsingular matrices over rings of almost stable range 1 // XII International Algebraic Conference in Ukraine dedicated to the 215th anniversary of V. Bunyakovsky, July 2–6, 2019,Vinnytsia, Ukraine. Abstracts. – Vinnytsia:Vasyl’ Stus Donetsk University, 2019. – 142 p. – P. 93–94.

105. Romaniv A. An element with almost stable range 1 over a commutative elementary divisor domain // Conference of young Scientists “Pidstryhach reading – 2019”. – L’viv, Ukraine May 27–29, 2019, L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2019/abstracts/Romaniv.pdf).

106. V. M. Fedorchuk and V. I. Fedorchuk. On classification of symmetry reductions and invariant solutions for the Euler–Lagrange–Born–Infeld equation. Book of Abstracts. Kiev, Bogolyubov Institute for Theoretical Physics of NAS of Ukraine, 2019, P.10. https://indico.bitp.kiev.ua/event/3/attachments/1/83/abstr_bgl_2019.pdf

107. Bilous A. Diagonability of idempotent matrices over APT ring // Conference of young Scientists “Pidstryhach reading – 2019”. – L’viv, Ukraine May 27–29, 2019, L’viv. – [Electronic resource]. – Access mode: (http://iapmm.lviv.ua/chyt2019/abstracts/Bilous.pdf).

108. Bilous A. Diagonability of idempotent matrices over duo rings // The XII International Algebraic Conference in Ukraine dedicated to the 215th anniversary of V.Bunyakovsky. July 02–06, 2019, Vinnytsia, Ukraine. Abstracts/ Vinnytsia: Vasyl' Stus Donetsk National University, 2019. – 142 p. – P. 17–18. http://jiac.donnu.edu.ua/article/view/6920/6951.

109. Prokip V.М. Algorithm for constructing a monic divisor for a polynomial matrix // International Conference “Algebraic and geometric methods of analysis”, Odesa, Ukraine. − 2019. − P. 68 − 69.

110. Dzhaliuk N.S., Petrychkovych V.M. Triangular solutions of matrix equation AX+YB=C // Modern problems of Mechanics and Mathematics: collection of scientific papers in 3 vol. / Edited by A.М. Samoilenko, R.M. Kushnir [Electronic resource] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. – 2018. – Vol. 3. – Access mode: www.iapmm.lviv.ua/mpmm2018. P. 197–198. (in Ukrainian)

111. Kuz A. M., Romaniv A. M., Symotiuk M. M. An analogue of an integral problem for equations with partial derivatives over a field of p–adic numbers // Nonlinear analysis problems: VI All–Ukrainian mat. conf. the name of B.V. Vasilishin: Abstract (26–28 september 2018р., Ivano–Frankivsk – Mykulychyn). – Ivano–Frankivsk: 2018. – P. 30.

112. Ladzoryshyn N. The solvability of Diophantine equations over quadratic rings // Modern problems of Mechanics and Mathematics: collection of scientific papers in 3 vol. / Edited by A.М. Samoilenko, R.M. Kushnir [Electronic resource] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. – 2018. – Vol. 3. – Access mode: (http://www.iapmm.lviv.ua/mpmm2018/Volume_3.pdf). P. 217–218.

113. Romaniv A.M. On the relationship between the Smith normal forms of matrices and of their least common multiple // Book of abstracts of the International Scientific Conference “Algebraic and geometric methods of analysis” (May 30 – June 4, 2018, Odesa, Ukraine). P.53. [Electronic resource]. – Access mode: (http://www.imath.kiev.ua/~topology/conf/agma2018)

114. Romaniv A., Shchedryk V. On stable range of matrix rings over commutative principal ideal rings // Modern problems of Mechanics and Mathematics: collection of scientific papers in 3 vol. / Edited by A.М. Samoilenko, R.M. Kushnir [Electronic resource] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. – 2018. – Vol. 3. – Access mode: www.iapmm.lviv.ua/mpmm2018. P. 241–242.

115. Shavarovskii B. Improved triangular form of the 3–by–3–matrices with one characteristic root in the class of semiscalarly equivalent // Modern problems of Mechanics and Mathematics: collection of scientific papers in 3 vol. / Edited by A.М. Samoilenko, R.M. Kushnir [Electronic resource] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. – 2018. – Vol. 3. – Access mode: www.iapmm.lviv.ua/mpmm2018. P. 241–242.

116. Volodymyr Fedorchuk, On some invariant solutions for the Euler–Lagrange–Born–Infeld equation // Symmetry and Integrability of Equations of Mathematical Physics, International workshop on the occasion of the fortieth anniversary of the Department of Applied Research (nowadays the Department of Mathematical Physics) (December 21–24, 2018, Kyiv, Institute of Mathematics of NAS of Ukraine). https://www.imath.kiev.ua/~appmath/Abstracts2018/FedorchukV.html.

117. Vasyl Fedorchuk, On Symmetry Reduction of Some Partial Differential Equations. // Modern problems of Mechanics and Mathematics: collection of scientific papers in 3 vol. / Edited by A.М. Samoilenko, R.M. Kushnir [Electronic resource] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. – 2018. – Vol. 3. – Access mode: www.iapmm.lviv.ua/mpmm2018. P. 187.

118. Volodymyr Fedorchuk, On Symmetry Reduction of the Eikonal Equation. // Modern problems of Mechanics and Mathematics: collection of scientific papers in 3 vol. / Edited by A.М. Samoilenko, R.M. Kushnir [Electronic resource] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. – 2018. – Vol. 3. – Access mode: www.iapmm.lviv.ua/mpmm2018. P. 188.

119. Fedorchuk Vasyl, On symmetry reduction and invariant solutions of some partial differential equations. The 32nd International Colloquium on Group Theoretical Methods in Physics (Group32) (9–13 July 2018, Czech Technical University in Prague, Czech Republic). Book of Abstracts. – p. 23., http://kmlinux.fjfi.cvut.cz/~burdices/Group32/new–booklet.pdf

120. Vasyl Fedorchuk, Volodymyr Fedorchuk, On classification of some non–singular manifolds in the space M(1,3)xR(u) and symmetry reduction of the eikonal equation. The XII–th International Conference of Differential Geometry and Dynamical Systems (DGDS–2018) (30 August – 2 September 2018, the Callatis High–School in the city Mangalia – Romania). Abstracts. – p. 1., http://www.mathem.pub.ro/dept/dgds–18/dgds–18.htm

121. Fedorchuk V.M., Fedorchuk V.I. On symmetry reduction of some partial differential equations. VI All–Ukrainian B.V. Vasylyshyn mathematical conference "Nonlinear problems of analysis" (26–28 september 2018, Ivano–Frankivsk – Mykulychyn). Book of Abstracts. Ivano–Frankivsk, Vasyl Stefanyk Precarpathian National University, 2018. – p. 63.

122. Fedorchuk V.І. On symmetry reduction and invariant solutions of the eikonal equation. VI All–Ukrainian B.V. Vasylyshyn mathematical conference "Nonlinear problems of analysis" (26–28 september 2018, Ivano–Frankivsk – Mykulychyn). Book of Abstracts. Ivano–Frankivsk, Vasyl Stefanyk Precarpathian National University, 2018. – c. 64.

123. Vasyl Fedorchuk, Volodymyr Fedorchuk, On classification of symmetry reductions for the Euler–Lagrange–Born–Infeld equation // Symmetry and Integrability of Equations of Mathematical Physics, International workshop on the occasion of the fortieth anniversary of the Department of Applied Research (nowadays the Department of Mathematical Physics) (December 21–24, 2018, Kyiv, Institute of Mathematics of NAS of Ukraine). https://www.imath.kiev.ua/~appmath/Abstracts2018/Fedorchuk.html.

124. Vasyl Fedorchuk, and Volodymyr Fedorchuk, On Classification of Symmetry Reductions for Partial Differential Equations www.mdpi.com/2504–3900/2/1/85; Proceedings 2018, 2(1), 85; https://doi.org/10.3390/proceedings2010085

125. Prokip Volodymyr On the similarity of matrices AB and BA // Modern problems of Mechanics and Mathematics: collection of scientific papers in 3 vol. / Edited by A.М. Samoilenko, R.M. Kushnir [Electronic resource] // Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. – 2018. – Vol. 3. – Access mode: www.iapmm.lviv.ua/mpmm2018. P. 260–261.

126. Prokip V.M. About a structure of solutions of the matrix equation AX – XB = C. Materials of reports International sciences Conferences "Modern problems of mathematical modeling, computational methods and information technologies", Rivne , 2018. P.138–139.

127. V.M. Prokip A note on similarity of matrices // // Book of abstracts of the International Scientific Conference “Algebraic and geometric methods of analysis” (May 30 – June 4, 2018, Odesa, Ukraine). P. 49. [Electronic resource]. – Access mode: (http://www.imath.kiev.ua/~topology/conf/agma2018)

128. Petrychkovych Vasyl', Dzhaliuk Nataliia Factorizations in the matrix ring and its subrings of the block matrices // The Fourth Conference of Mathematical Society of the Republic of Moldova: dedicated to the centenary of Vladimir Andrunachievici (1917–1997): Proceedings CMSM 4, June 28 – July 2, 2017 Chisinau / ed.: Mitrofan Choban [et al.]. Chisinau: Institute of Mathematics and Computer science, 2017 (CEP USM). P.143–146.

129. Petrychkovych V.M., Dzhaliuk N.S. A bound on degrees of solutions of the matrix linear bilateral polynomial equation // Book of abstracts of the XI International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V.Kirichenko (July, 2017, Kyiv, Ukraine). P.99.

130. Romaniv A.M. The Smith normal form of the lest common multiples of one class of matrices // Book of abstracts of the XI International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V.Kirichenko (July, 2017, Kyiv, Ukraine). P.115.

131. Shavarovskii B.Z. Improved triangular form of the matrix and its invariants // Book of abstracts of the XI International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V.Kirichenko (July, 2017, Kyiv, Ukraine). P.123.

132. Shchedryk V.P. Helmer lemma for Bezout domains of stable range 1.5 // Book of abstracts of the XI International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V.Kirichenko (July, 2017, Kyiv, Ukraine). P.124.

133. Romaniv A. On decomposition of matrices from full linear group in the product matrices from certain its subsets // Conference of young Scientists “Pidstryhach reading – 2017”. – L’viv, Ukraine May 23–25, 2017, L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2017/abstracts/Romaniv.pdf).

134. Prokip V.M. On solvability of the matrix equation АХ=XВ over integral domains // Book of abstracts of the XI International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V.Kirichenko (July, 2017, Kyiv, Ukraine). P.107.

135. Prokip V.M. About coexistence of system of matrix equations AX = B і BY = A over commutative rings // PSC–IMFS–13 dedicated to the 125th anniversary Stefana Banaha. March 30–31, 2017. L'viv, Ukraine. Conference Proceedings. P.65–66. – [Electronic resource]. – Access mode: (http://psc–imfs.lpnu.ua/sites/default/files/PSC–13.pdf).

136. Fedorchuk Vasyl. O klasyfikacji niskowymiarowych algebr Liego // Abstrakty Drugiej Ogόlnopolskej Konferencji Naukowej "Oblicza Algebry II" (Krakόw, 1–4 czerwca, 2017), Uniwersytet Pedagogiczny im. KEN w Krakowie. − S. 15. − http:// algebra.up.krakow.pl/II/files/abstrakty. http://algebra.up.krakow.pl/II/files/abstrakty.pdf.

137. Fedorchuk Vasyl, Fedorchuk Volodymyr. On Сlassification of Symmetry Reductions for Partial Differential Equations // Program and Abstract Book. Symmetry 2017: The 1st International Conference on Symmetry (16–18 October 2017, Parc Cientific de Barcelona, Spain), MDPI. − P. 168.

138. Fedorchuk V.M. , Fedorchuk V.I. On Classification of Some Non–Singular Manifolds In the Space M(1,3) ×R(u). // BGL17: 10th Bolyai–Gauss–Lobachevski Conference on Non–Euclidean Geometry and its Applications. (Aug 20–26, 2017 Gyöngyös, Hungary). https://indico.cern.ch/event/586799/attachments/1400831/2353974/bgl17_preliminary_agenda.pdf.

139. Fedorchuk V.M., Fedorchuk V.I. Classification of low–dimensional Lie Algebras // Book of abstracts of the XI International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V.Kirichenko. July, 2017, Kyiv, Ukraine. – 159 p. – P. 42.

140. Bilous A. M. Effective duo rings // Book of abstracts of the XI International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V.Kirichenko, July, 2017, Kyiv, Ukraine – P.23.

141. Romaniv A. M. The Smith normal form of the greatest common divisor of one class of matrices // Conference of young Scientists “ Pidstryhach reading – 2016”. – L’viv, Ukraine May 25–27, 2016., L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2016/theses/Romaniv.pdf).

142. Prokip V.M. The structure of rank 1 matrices over the domain of principal ideals with respect to similarity transformation // Algebra and logic. Abstracts of International reports. conference devoted to the 70th anniversary of V. M. Levchuk Krasnoyars, 24–29 July 2016 . P.63–64. (in Russian)

143. Prokip V.M. On symmetric solutions of linear matrix equations over the domain of principal ideals // 12 The open scientific conference of the Institute of Applied Mathematics and Fundamental Sciences (IMFN). Collection of conference materials 2–3 June 2016 (L’viv, Ukraine). P.41–42. (in Ukrainian)

144. Prokip V.M. On the structure of symmetric solutions of the matrix equation АX=B // International Scientific Conference Algebraic and Geometric Methods of Analysis, 2–8 June 2016, Odesa, Ukraine. P. 51. (in Ukrainian)

145. Bilous A.M. Simultaneous reduction of a pair of matrices over some class of duo rings// X International Algebraic Conference in Ukraine dedicated to the 70^th anniversary of Yu. A. Drozd. August 20 – 27, 2015. Odessa, Ukraine. Abstracts. – P. 17.

146. Ladzoryshyn N., Petrychkovych V. On solutions of the matrix linear equations AX+YB=C over quadratic rings // Book of abstracts of the X International Algebraic Conference in Ukraine dedicated to the 70th anniversary of Yu. A. Drozd, August 20 – 27, 2015, Odessa. – Abstract. – Odessa: TES, 2015. – P. 61.

147. Ladzoryshyn N.B. The matrix linear unilateral equations over quadratic rings // Conference of young Scientists “ Pidstryhach reading – 2015”.– L’viv, Ukraine, May 26–28, 2015, L’viv. – [Electronic resource]. – Access mode (http://www.iapmm.lviv.ua/chyt2015/theses/Ladzoryshyn.pdf).

148. Romaniv A. M. On the divisibility of the second–order matrices // International V. Skorobohatko Mathematical Conference (August 25 – 28, 2015, Drohobych, Ukraine). Abstracts. Lviv –2015. P. 135.

149. Romaniv A. M. Greatest common left divisor of second ordre matrices // Conference of young Scientists “Pidstryhach reading – 2015”. – L’viv, Ukraine May 26–28, 2015., L’viv. – [Electronic resource]. – Access mode: (http://www.iapmm.lviv.ua/chyt2015/theses/Romaniv.pdf)

150. B.Z. Shavarovskii. When polynomial matrices of second order semiscalarly are equivalent? // X International Algebraic Conference in Ukraine dedicated to the 70^th anniversary of Yu. A. Drozd. August 20 – 27, 2015. Odessa, Ukraine. Abstracts. P. 100.

151. Bogdan Shavarovskii/ On the canonical form a certain class of matrices of the second order with respect to the semiscalar equivalence // International V. Skorobohatko Mathematical Conference (August 25 – 28, 2015, Drohobych, Ukraine). Abstracts. Lviv –2015. P. 149.

152. Shchedryk V.P. Decomposition of general linear group and ring’s stable range // Book of abstracts of the X International Algebraic Conference in Ukraine dedicated to the 70–th anniversary of Yu. A. Drozd, August 20 – 27, 2015, Odessa. – P. 101.

153. Volodymyr Prokip. Solutions of a linear matrix equation XA₀ = A₁ with prescribed characteristic polynomials // Oblicza Algebry. Ogól–nopolska Konferencja Naukowa, Kraków, Poland (May 29 – 30, 2015 r.) – С.33. http://algebra.up.krakow.pl http://algebra.up.krakow.pl/abstr–all–strona3.pdf?w=no.

154. Prokip V.M. Solutions of the matrix equation XA₀ = A₁ over domains of principal ideals with prescribed characteristic polynomials // X International Algebraic Conference in Ukraine dedicated to the 70^th anniversary of Yu. A. Drozd. August 20 – 27, 2015. Odessa, Ukraine. Abstracts. P. 91.

155. Volodymyr Prokip. On common eigenvectors of two matrices over a principal ideal domain // International V. Skorobohatko Mathematical Conference (August 25 – 28, 2015, Drohobych, Ukraine). Abstracts. Lviv –2015. P. 129.

156. Vasyl Fedorchuk, Volodymyr Fedorchuk, On classification of reduced equations for the eikonal equation, International workshop in honor of 70th birthday of Anatoly Nikitin "Symmetry and Integrability of Equations of Mathematical Physics" (December 27−28, 2015, Kyiv), Institute of Mathematics of NAS of Ukraine, http://www.imath.kiev.ua/~appmath/Abstracts2015/FedorchukVas.pdf.

157. V. Fedorchuk, V. Fedorchuk, On symmetry reduction and invariant solutions of some P(1,4)–invariant differential equations, Abstracts of the 14th Conference “Mathematics in Technical and Natural Sciences” (September 18–24, 2015, Kościelisko), Faculty of Applied Mathematics of AGH University of Science and Technology, Kraków, Poland.

158. Vasyl Fedorchuk, O niektórych zastosowaniach skończenie wymiarowych algebr Lie’go lokalnych grup Lie’go przekształceń punktowych, abstracty Ogólnopolskej Konferencji Naukowej "Oblicza Algebry" (Maj 29–31, 2015, Kraków), Uniwersytet Pedagogiczny im. KEN w Krakowie, http://algebra.up.krakow.pl/abstr–all–strona3.pdf, S.12.

159. Vasyl Fedorchuk, On classification of the non–conjugate subalgebras of the Lie algebra of the Poincare group P(1,4) and symmetry reduction of some differential equations // International V. Skorobohatko Mathematical Conference (August 25 – 28, 2015, Drohobych, Ukraine). Abstracts. Lviv –2015. P. 39.

160. Fedorchuk V.I. On Exact Solutions of Some P(1,4)-Invariant d'Alembert Equations // International conference of young mathematicians (Kuiv, 3–6 June 2015): Book of abstracts. – Kyiv, 2015. – P. 118.

161. Ladzoryshyn N.B. The matrix linear unilateral equations over quadratic rings // Conference of young Scientists “ Pidstryhach reading – 2015”.– L’viv, Ukraine, May 26–28, 2015, L’viv. – [Electronic resource]. – Access mode (http://www.iapmm.lviv.ua/chyt2015/theses/Ladzoryshyn.pdf).

162. Ladzoryshyn N., Petrychkovych V. On solutions of the matrix linear equations AX+YB=C over quadratic rings // X International Algebraic Conference in Ukraine dedicated to the 70^th anniversary of Yu. A. Drozd. August 20 – 27, 2015. Odessa, Ukraine. Abstracts. – P. 61.

163. Petrychkovych V.M., Dzhaliuk N.S. Structure of solutions of the matrix Diofantine polynomial equations // International Algebraic Conference dedicated to 100^th anniversary of L.A. Kaluzhnin. Book of Abstracts. Jule 7–12, 2014. Kyiv. – P. 29.

164. Romaniv A.M. On the least common right multiples of matrices over an adequate domain // International Algebraic Conference dedicated to anniversary of L.A. Kaluzhnin in Ukraine, July 7–12, 2014. Book of abstract – Kyiv: Taras Shevchenko National University of Kyiv, 2014. – P. 72.

165. Ladzoryshyn N.B. The integral solutions of bilateral linear matrix equations over quadratic rings // International Algebraic Conference dedicated to 100^th anniversary of L.A. Kaluzhnin. Book of Abstracts. Jule 7–12, 2014. Kyiv.– P. 52.

166. Ladzoryshyn N.B. Integer solutions of matrix Diophantine equation over quadratic rings // Conference of young Scientists “ Pidstryhach reading – 2014”.– L’viv, Ukraine, May 28–30, 2014, L’viv. – [Electronic resource]. – Access mode (http://www.iapmm.lviv.ua/chyt2014/theses/Ladzoryshyn.pdf).

167. B.Z. Shavarovskii. Quasi–diagonal similarity and semiscalar equivalence of matrices // International Algebraic Conference dedicated to 100^th anniversary of L.A. Kaluzhnin. Book of Abstracts. Jule 7–12, 2014. Kyiv. P. 76 – 77.

168. Shchedryk V. On Bezout rings of stable range 1,5 // Book of abstracts of the International Algebraic Conference dedicated to 100 anniversary of L.A. Kaluzhnin, July 7–12, 2014, Taras Shevchenko National University of Kyiv, Ukraine, P.77–78.

169. Prokip V. On common solutions of matrix equations over an elemen–tary divisor domain // International Algebraic Conference dedicated to 100^th anniversary of L.A. Kaluzhnin. Book of Abstracts. Jule 7–12, 2014. Kyiv. P. 69.

170. Fedorchuk V.M., Fedorchuk V.I., On Invariant Operators of Nonconjugate Subalgebras of the Lie Algebra of the Poincare Group P(1,4), Book of abstracts of the International Algebraic Conference dedicated to 100th anniversary of L.A.Kaluzhnin (July 7–12, 2014, Kyiv, Ukraine), Taras Shevchenko National University of Kyiv, p. 29.

171. Vasyl Fedorchuk, Volodymyr Fedorchuk, On Symmetry Reduction of Some P(1,4)–invariant Differential Equations, Abstracts of The XVIth International Conference is Dedicated to 70th Anniversary of Professor Jan J. Sławianowski (June 6–11, 2014, Varna, Bulgaria), Institute of Biophysics, Bulgarian Academy of Sciences, http://www.bio21.bas.bg/conference/Conference_files/abstr2014/Fedorchuk.pdf.

172. Dzhaliuk N., Petrychkovych V. Semiscalar equivalence of polynomial matrices and solutions of the matrix linear polynomial equations // 9–th International algebraic conference in Ukraine, L'viv, July 8–13, 2013: Book of abstracts. – L'viv, 2013. – P. 57.

173. Ladzoryshyn N., Petrychkovych V. Equivalence of pairs of matrices with relatively prime determinants over quadratic principal ideal rings // 9–th International algebraic conference in Ukraine, L'viv, July 8–13, 2013: Book of abstracts. – L'viv, 2013. – P. 109.

174. Ladzoryshyn N. The matrix linear bilateral equations over quadratic rings // International Conference “Modern Problems of Mechanics and Mathematics”. – L’viv, Ukraine May 21–25, 2013, L’viv. Abstract. – L’viv: YA. S. Pidstryhach Institute for APMM NAS of Ukraine. – P. 187–189.

175. А.М. Romaniv Greatest common left divisor of matrices one of which is disappear // Abstract of 9–th International Algebraic Conference in Ukraine, Jule 5–12, 2013. / Abstract of talks – Lviv: Lviv Taras Shevchenko National University Ukraine 2013. – p.156.

176. B.Z. Shavarovskii. Reduction of polynomial matrices by semiscalar equivalent transformation // 9^th International Algebraic Conference in Ukraine. July 8–13, 2013, L’viv, Ukraine. Book of abstracts. P. 172.

177. Prokip V. Normal form with respect to similarity of involutory matrices over a principal ideal domain // 9^thInternational Algebraic Conference in Ukraine. Abstracts. Jule 8–13, 2013. Lviv. P. 149.

178. Vasyl M. Fedorchuk, Volodymyr I. Fedorchuk, On symmetry reduction of some differential equations and classification of low–dimensional nonconjugate subalgebras of the Lie algebra of the Poincare group P(1,4), International workshop in honor of Wilhelm Fushchych "Symmetry and Integrability of Equations of Mathematical Physics" (December 22−23, 2013, Kyiv), Institute of Mathematics of NAS of Ukraine, http://www.imath.kiev.ua/~appmath/AbstractsWIF/FedorchukVas2013.pdf

179. Fedorchuk V.M., Fedorchuk V.I., Classification of low–dimensional non–conjugate subalgebras of the Lie algebra of the Poincare group P(1,4), 9–th International Algebraic Conference in Ukraine (July 8–13, 2013, L'viv, Ukraine), Book of abstracts, L'viv, Ivan Franko National University of L'viv, p. 58.

180. Dzhaliuk N., Petrychkovych V. On the minimal degree solutions of the Sylvester matrix polynomial equations // International mathematical conference: abstracts of talks. – Mykolayiv: Published by Mykolayiv V.O. Suchomlinsky National University, 2012. – P. 138.

181. Vasyl` Petrychkovych, Nataliia Dzhaliuk The matrix Diophantine polynomial equations // International Conference on Algebra dedicated to 100th anniversary of S.M. Chernikov, August 20–26, 2012, Dragomanov National Pedagogical University, Kiev, Ukraine: Book of abstracts. – Kiev: Institute of Mathematics of UNAS, 2012. – P. 116.

182. B. Shavarovskii. On similarity of pairs of matrices, in which one matrix has only one elementary divisor // International mathematical conference: abstracts of talks. – Mykolayiv: Published by Mykolayiv V.O. Suchomlinsky National University, 2012. – P. 134.

183. Romaniv A., Shchedryk V. On Smith normal form of greatest common left divisor and least common right multiple of matrices // International mathematical conference: abstracts of talks. – Mykolayiv: Published by Mykolayiv V.O. Suchomlinsky National University, 2012. – P. 116–117.

184. Bogdan Shavarovskii. On similarity of pairs of matrices, in which one matrix is nonderogatory // International Conference on Algebra dedicated to 100th anniversary of S.M. Chernikov, August 20–26, 2012, Dragomanov National Pedagogical University, Kiev, Ukraine: Book of abstracts. – Kiev: Institute of Mathematics of UNAS, 2012. – P. 138.

185. Volodymyr Prokip. Normal form with respect to similarity of a matrix with minimal polynomial m(λ)=(λ–α)(λ–β),(α≠β) // International Conference on Algebra dedicated to 100th anniversary of S.M. Chernikov, August 20–26, 2012, Dragomanov National Pedagogical University, Kiev, Ukraine: Book of abstracts. – Kiev: Institute of Mathematics of UNAS, 2012. – P. 121.

186. Prokip V.M. Note on the Hermite normal form // International Conference dedicated to the 120th anniversary of Stefan Banach, Lviv, Ukraine, 17–21 September 2012. Abstracts of Reports. – P. 262.

187. Bogdan Shavarovskii On the canonical form for a certain class of matrices with respect to similarity // International Conference dedicated to the 120th anniversary of Stefan Banach, Lviv, Ukraine, 17–21 September 2012. Abstracts of Reports. – P. 264.

188. Romaniv A., Shchedryk V. On Smith normal form of greatest common left divisor and least common right multiple of matrices // International mathematical conference: abstracts of talks. – Mykolayiv: Published by Mykolayiv V.O. Suchomlinsky National University, 2012. – P. 116–117.

189. Volodymyr Shchedryk On factorizability and associativity of matrices // International Conference on Algebra dedicated to 100th anniversary of S.M. Chernikov, August 20–26, 2012, Dragomanov National Pedagogical University, Kiev, Ukraine: Book of abstracts. – Kiev: Institute of Mathematics of UNAS, 2012. – P. 139.

190. Fedorchuk V.M, Fedorchuk V.I., Classification of non–singular manifolds in the space M(1,4)×R(u) invariant under one– and two–dimensional non–conjugate subalgebras of the Lie algebra of the Poincaré group P(1,4) // 8^thBolyai–Gauss–Lobachevsky Conference "Non–Euclidean Geometry in Modern Physics and Mathematics" (Uzhgorod, Ukraine, 22–25 May 2012). Programme and Abstracts. Uzhgorod, 2012, IEP of the NAS of Ukraine, p. 43.

191. Vasyl Fedorchuk, Volodymyr Fedorchuk, Non–equivalent functional bases of invariants for non–conjugate subgroups of the Poincaré group P(1,4) in the space M(1,4)×R(u) // International mathematical conference: abstracts of talks. – Mykolayiv: Published by Mykolayiv V.O. Suchomlinsky National University, 2012. – P. 3. Vasyl Fedorchuk, Volodymyr Fedorchuk, Invariant operators of five–dimensional non–conjugate subalgebras of the Lie algebra of the Poincaré group P(1,4) // International Conference on Algebra dedicated to 100th anniversary of S.M. Chernikov, August 20–26, 2012, Dragomanov National Pedagogical University, Kiev, Ukraine: Book of abstracts. – Kiev: Institute of Mathematics of UNAS, 2012. – P. 48.

192. Vasyl Fedorchuk, Volodymyr Fedorchuk, Classification of functional bases of invariants in the space M(1,3)×R(u) for one– and two– parametrical non–conjugate subgroups of the Poincaré group P(1,4) // International Conference dedicated to the 120th anniversary of Stefan Banach, Lviv, Ukraine, 17–21 September 2012. Abstracts of Reports. – P. 189.

193. Petrychkovych V. M., Dzhaliuk N. S. Factorizations in rings of block triangular matrices // Book of abstracts of the 8th International Algebraic Conference in Ukraine (July 5 – 12, 2011, Lugansk Taras Shevchenko National University, Ukraine), P. 159.

194. Prokip V.M. About the normal form of linear matrix pencils // III International Conference on matrix methods and operator equations. Moscow, June 22–25, 2011. Abstracts. – Moscow, 2011. – P. 39.

195. Romaniv А. On monic divisors of polynomial matrices // Book of abstracts of the 8th International Algebraic Conference in Ukraine (July 5 – 12, 2011, Lugansk Taras Shevchenko National University, Ukraine), P. 178.

196. Fedorchuk Vasyl M., Fedorchuk Volodymyr I. Classification of the five–dimensional non–conjugate subalgebras of the Lie algebra of the Poincaré group P(1,4) // Book of abstracts of the 8th International Algebraic Conference in Ukraine (July 5 – 12, 2011, Lugansk Taras Shevchenko National University, Ukraine), P. 160

197. Shavarovskii B. Canonical forms for matrices under semiscalar equivalence // Book of abstracts of the 8th International Algebraic Conference in Ukraine (July 5 – 12, 2011, Lugansk Taras Shevchenko National University, Ukraine), P. 181.

198. Shchedryk V. On elementary divisor rings and properties of its elements // Book of abstracts of the 8th International Algebraic Conference in Ukraine (July 5 – 12, 2011, Lugansk Taras Shevchenko National University, Ukraine), P. 222.

199. Shchedryk V. Matrices divisors generated by transformable matrices // Int. Alg. Conf. dedicated to A.V. Yakovlev. 2010. – S. Peterburg. – Jun 19–24, 2010. Abstracts. S. Peterburg. – P.153–154.

200. Kateryna Pavlyk and Oleg Gutik, On some semigroup constructions // AAA80 workshop on general algebra in connection with the Workshop on non–classical algebraic structures, 1–6 June 2010, Bedlewo, Poland. – Online.

201. Ladzoryshyn N.B. On equivalence of certain pairs of matrices over quadratic Euclidean rings // XIII inter¬natio¬nal Scientific Kravchuk mathematical conference. – Kyiv, Ukraine , May 13–15, 2010: Conference materials. V.2 – K. NTUU – 320 p. – P. 166.

202. B. Shavarovskii On the invariants of polynomial matrices with respect to semiscalar equivalence // 7 International Algebraic Conference in Ukraine: abstracts of talks ( 18 – 23 August, 2009, Kharkov) – Kiev, 2009. – 168 p. P. 127–128.

203. Bogdan Shavarovskii Solving a System of Linear Two–Sided Matrix Equations // Ukrainian Mathematical Congress. – Kiev, 2009. www.imath.kiev.ua/~congress2009/Abstracts/Shavarovski.pdf

204. Shchedryk V. On matrices reduction by one–side transformations // 7 International Algebraic Conference in Ukraine: abstracts of talks (18 – 23 August, 2009, Kharkov) – Kiev, 2009, 168 p. – P. 128–129.

205. Shchedryk V. On invariant factors of block–triangular matrix and its diagonal blocks // Ukrainian Mathematical Congress. – Kiev, 2009 www.imath.kiev.ua/~congress2009/Abstracts/Shchedryk.pdf

206. Prokip V. M. On semiskalar equivalence of polynomial matrices over a field // Abstract of 7–th International Algebraic Conference in Ukraine, 2009. – Abstract of talks, Kharkiv, 2009. – p.111–112.

207. Prokip V.M.On common divisors of polynomial matrices // Ukrainian Mathematical Congress. – Kiev, 2009 www.imath.kiev.ua/~congress2009/Abstracts/Prokip.pdf

208. Petrychkovych V.M. Matrix polynomial equations and its solutions // 7 International Algebraic Conference in Ukraine: abstracts of talks (18 – 23 August, 2009, Kharkov).– Kiev, 2009. – 168 p. – P. 108–109.

209. Petrychkovych V.M., Zabavsky B.V. On the stable range of rings of matrices // 7 International Algebraic Conference in Ukraine: abstracts of talks (18 – 23 August, 2009, Kharkov).– Kiev, 2009. – 168 p. – P. 109–110.

210. Petrychkovych V.M. Matrix polynomials its divisors and structure // Ukrainian Mathematical Congress. – Kiev, 2009 www.imath.kiev.ua/~congress2009/Abstracts/Petrychkovych.pdf

211. Dzhalyuk N.S. Equivalence and factorization of partitioned matrices // 7 International Algebraic Conference in Ukraine: abstracts of talks (18 – 23 August, 2009, Kharkov).– Kiev, 2009. – 168 p. – P. 49–50.

212. Kateryna Pavlyk, Oleg Gutik and Andriy Reiter On Topological Semigroups of Matrix Units // The 14th general meeting of European women in mathematics, Novi Sad, Serbia August 25–28, 2009, Book of Abstracts 2. – P. 36–37.

213. Ladzoryshyn N.B. On equivalence of pairs of matrices over quadratic Euclidean rings // Conference of young Scientists Pidstryhach with Modern Problems of Mechanics and Mathematics. – L’viv, Ukraine, May 25–27, 2009. – P. 176–177.

214. Vasyl Fedorchuk, Volodymyr Fedorchuk, O konstruowaniu klas rownan rozniczkowych z nietrywialnymi grupami symetrii // III forum matematykow polskich (30.06–02.07 2009, Krakow, Polska), Book of abstracts. – P. 12.

215. V.M. Fedorchuk, V.I. Fedorchuk, On some classes of the partial differential equations with non–trivial symmetry groups // XVI International Congress on Mathematical Physics, Prague, August 3–8, 2009, Book of abstracts. – P. 49–50.

216. Shavarovs’kii B. On the class of factorable polynomial matrices // 6th International Algebraic Conference in Ukraine. Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 187–188.

217. Fedorchuk Vasyl M., Fedorchuk Volodymyr I. On classification of the four–dimensional decomposable non–conjugate subalgebras of the Lie algebra of the Poincare group P(1,4) // 6th International Algebraic Conference in Ukraine. – Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 78–79.

218. Prokip V. About the uniqueness solution of the matrix polynomial equation // 6th International Algebraic Conference in Ukraine. Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 158–159.

219. Shchedryk V.,. Mel’nyk O. On canonical diagonal form of matrices product // 6th International Algebraic Conference in Ukraine. Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 188–189.

220. Dzhalyuk N., Petrychkovych V. Factorizations of partitioned matrices and solutions of linear matrix equations // 6th International Algebraic Conference in Ukraine. Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 75–76.

221. Petrychkovych V. On factorizations of matrices over some classes ofrings // International conference ASADE, Chisineu, August 21–23, 2007. – P.108–109.

222. Gutik O. V. , Pavlyk K. P. Topological Brandt λ^0–extensions and H–closed topological semigroups // 6th International Algebraic Conference in Ukraine. Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 88–89

223. Zelisko V., Ladzoryshyn N., On equivalence and factorization of matrices over quadratic rings // 6th International Algebraic Conference in Ukraine. Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 231–232.

224. Romaniv A., On regular divisors of polynomial matrices // 6th International Algebraic Conference in Ukraine. Kamyanets–Podilsky, July 1–7, 2007. Abstracts. – Kamyanets–Podilsky, 2007. – P. 171–172.

225. Fedorchuk Vasyl M, Fedorchuk Volodymyr I. On classification of the four–dimensional decomposable non–conjugate subalgebras of the Lie algebra of the Poincare group P(1,4) // 6th International Algebraic Conference in Ukraine (July 1–7, 2007, Kamyanets–Podilsky, Ukraine), Abstracts, Kamyanets–Podilsky, Kamyanets–Podilsky State University, P. 78–79.

226. Prokip V. On similarity of a matrix and its transpos // International Conference on Radicals ICOR–2006, July 30 – August 5, 2006, Kyiv, Ukraine. – Kyiv, 2006. – P. 55.

227. Gutik O. V. and Pavlyk K. P. On Brandt λ^0–Extensions of Topological Semigroups with Zero // Forth Summer School “Algebra, Topology, Functional and Stochastic Analysis”, Lviv–Kozyova, July 17–29, 2006. Invited Lectures and Abstracts of Research Reports. – Lviv–Kozyova, 2006. – P. 139–142.

228. Fedorchuk Vasyl, Fedorchuk Volodymyr, On some Applications of Invariant of Continuous Subgroups of the Poincare Group P(1,4) in Mathematical Physics // Eotvos Lorand University, 29th August – 4th September, Budapest, Hungary. – Budapest, 2005. – P. 18.

229. Fedorchuk Vasyl M., Fedorchuk Volodymyr I. On functional bases of the first–order differential invariants for non conjugate subgroups of the Poincare group P(1,4)// XIII–th Polish–Czech–Slovak Mathematical School, Krakow. Dobcryce Jalowcowa Gora. 8th–10th June 2006. Book of Abstracts. – Pedagogical Univ. of Cracow, Departament of Mathematics, 2006. – P. 35.

230. Shavarovs’kii B. On the block–diagonal equivalence of matrices // International Conference on Radicals ICOR–2006, July 30– August 5, 2006, Kyiv, Ukraine. – Kyiv, 2006. – P. 62–63.

231. Shchedryk V. Unilateral equivalence of singular martices and singular divisors of matrices // International Conference on Radicals ICOR–2006, July 30 – August 5, 2006, Kyiv, Ukraine. – Kyiv, 2006. – P. 64–66.

232. Gutik O.V. and Pavlyk K.P. On absolutely H–closed topological semigroups and Brandt λ^0–extensions // 5th International Algebraic Conference in Ukraine. Odessa, July 20–27, 2005. Abstracts. – Odessa, 2005. – P. 83–84.

233. Petrychkovych V.M. Generalized equivalence of matrices and its collections and factorization of matrices over rings // 5th International Algebraic Conference in Ukraine. Odessa, July 20–27, 2005. Abstracts. – Odessa, 2005. – P. 155.

234. Prokip V. On common divisors of matrices over principal ideal domain // 5th International Algebraic Conference in Ukraine. Odessa, July 20–27, 2005. Abstracts. – Odessa, 2005. – P. 159–160.

235. Shchedryk V.P. Some determinant properties of matrices // 5th International Algebraic Conference in Ukraine. Odessa, July 20–27, 2005. Abstracts. – Odessa, 2005. – P. 188.

236. Shavarovs’kii B.Z. On similarity of some collection of matrices // 5th International Algebraic Conference in Ukraine. Odessa, July 20–27, 2005. Abstracts. – Odessa, 2005. – P. 186–187.

237. Fedorchuk Vasyl, Fedorchuk Volodymyr, On symetry reduction of some new classes of the first–order differential equations in the space M(1,4)xR(4) // XII–th Czech–Polish–Slovak Mathematical School. High School Hlulios 2.06.2005–4.06.2005. Book of Abstracts. – Univ. of Jan Evangelista Purkyne in Usti nad Labem, 2005. – P. 20–25.

238. Gutik O. and Pavlyk K. On compact congruence–free topological inverse semigroups // International Conference dedicated to the 125–th anniversary of Hans Hahn, Chernivtsi, Ukraine, June 27 – July 3, 2004. Book of abstracts. – Chernivtsi, 2004. – P. 128–130.

239. Prokip V. On common divisors of matrices over principal ideal domain // 13th IWMS 2004. August 2004, Poland, Poznan`. Abstract. – Poznan`, 2004. – P. 23.

240. Fedorchuk V.M., Fedorchuk V.I. Symmetry Reduction of Some Closses of the First–Order Differential Equations in the Space M(1,4)xR(u) // XI Slovak–Polish–Czech. math. school. June 2–5, 2004, Ruzomherok. Book of abstract. – Ruzomherok, 2004. – P. 13.

241. Gutik O.V. and Pavlyk K.P. On Brandt λ^0–extensions of semigroups with zero // IV International Algebraic Conference in Ukraine, Lviv, August 4–9, 2003, Abstracts. – Lviv, 2003. – P. 88–89.

242. Dzhalyuk N.S. and Petrychkovych V.M. On common divisors of polynomial matrices // 4th International Algebraic Conference in Ukraine, Lviv, 4–9 August, 2003, Abstracts. – Lviv, 2003. – P. 65–66.

243. Petrychkovych V.M. Standard forms of matrices and its collections with respect to various equivalences and its applications // 4th International Algebraic Conference in Ukraine, Lviv, 4–9 August, 2003, Abstracts. – Lviv, 2003. – P. 171–172.

244. Prokip V. On a class of divisors of polynomial matrices over integer domains // 4th International Algebraic Conference in Ukraine, Lviv, 4–9 August, 2003, Abstracts. – Lviv, 2003. – P. 177–178.

245. Fedorchuk V.M., Fedorchuk V.I. On construction first–order differential equations in the space M(1,3)xR(4) with non trivial symmetries // X Polish–Chech. Mathematical school. Poraj, June 4–7, 2003. – Book of abstracts, Institute of Mathematics and Computer Science, Czestochowa Pedagogical Universuty. – P. 20.

246. Fedorchuk V.M., Fedorchuk V.I. On differential first–order differential invariants of the continuous subgroups of the Poincare group P(1,4) // 4th International Algebraic Conference in Ukraine, Lviv, 4–9 August, 2003, Abstracts. – Lviv, 2003. – P. 69–70.

247. Shavarovs`kyj B.Z. Similarity invariants of the collection of matrices of order 2k with k identical elementary divisors // 4th International Algebraic Conference in Ukraine, Lviv, August 4–9, 2003, Abstracts. – Львів, 2003. – P. 202–203.

248. Shchedryk V.P. Divisors of matrices over elementary divisor ring // 4th International Algebraic Conference in Ukraine, Lviv, August 4–9, 2003, Abstracts. – Львів, 2003. – P. 204–205.

249. Gutik O.V., Pavlyk K. P. On H–closed topological semigroups and Brandt λ–extensions // International Mathematical Conference honoring D.A. Grave's 100th year since the begining of his work at Kyiv University. Kyiv, June 17–22, 2002. – Kyiv, 2002. – P. 29–30.

250. Gutik O.V., Pavlyk K.P. Topological Brandt λ–extensions of absolutely H–closed topological inverse semigroups // International Algebraic Conference Dedicated to the memory of Z.I. Borevich, St. Petersburg, Russia, September 17–23, 2002. – Abstracts of reports. – St. Petersburg, 2002. – Р. 99–103.

251. Petrychkovych V.M. On factorizations of matrices over ring // International Algebraic Conference Dedicated to the memory of Z.I.Borevich, St.Petersburg, Russia, September 17–23, 2002. Abstracts of reports. – St. Peterburg, 2002. – Р. 138–139.

252. Fedorchuk V.М., Fedorchuk V.I. O niektorych zastosowaniach niesprzezonych podalgebr algebry Lie'go uogolnionej grupy Poincare P(1,4) // Zastosowania algebry VI (Zakopane – Jaszczurowka, 25 lutego – 3 marca 2002). – Czestochowa: WSP w Czestochowie. – 2002.

253. Fedorchuk V.M., Fedorchuk V.I. Some new differential equations of the first–order in the space M(1,3)xR(u) with given symmetry groups. // Functional Analysis and its Applications: Proc. Int. Conf. Dedicated to the 110th anniversary of Stefan Banach, Lviv, May 28–31, 2002. – Lviv: Lviv Ivan Franko National University, Pidstryhach Inst. for Appl. Probl. of Mech. and Math. – 2002.– P. 69.

254. Fedorchuk V.M., Fedorchuk V.I. On Differential Invariants of First– and Second–Order of the Splitting Subgroups of the Generalized Poincare Group P(1,4) // Symmetry in Nonlinear Mathematical Physics: Proc. 4th Int. Conf. (Ukr. Math. Congr. Dedicated to 200th Anniversary of Mykhailo Ostrohrads'kyi), Kyiv, 9–15 July, 2001.– Part 1.– Kyiv: Inst. of Math. of NAS of Ukraine. – 2002. – Р. 140–144. – (Proc. Inst. of Math. of NAS of Ukraine.– 2002.– Vol. 43, Part 1).

255. Fedorchuk V.M., Fedorchuk V.I. On construction of the first–order differential equations in the space M(1,4)x R(u) with non trivial symmetry groups // The Int. Math. Conf. Honoring O.A. Graves's 100th year since the beginning of his work at Kyiv University, Kyiv, 17–22 June, 2002. – Kyiv: Inst. of Math. of NAS of Ukraine, Kyiv Nat. Taras Shevchenko Univ. – 2002. – P. 21.

256. Fedorchuk V.M., Fedorchuk V.I. First–order differential invariants of the splitting subgroups of the Poincare group P(1,4), 4rd // Conf. "Geometry and Topology of Manifolds", Krynica, April 29 to May 4, 2002. – Lodz: Inst. of Math. of the Technical University of Lodz. – 2002. – P. 24.

257. Fedorchuk V. On new differential equations of the first–order in the Space M(1,4)xR(u) with nontrivial symmetries, 9th // Polish–Czech Mathematical School, Krakow–Osieczany, 6th–8th June, 2002. – Krakow: Pedagogical Univ. of Cracow, Inst. of Math. – 2002. – P. 15.

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