Vol. 73 No. 5 (2021)

Research articles

• On the representation by bivariate ridge functions

  R. A. Aliev, A. A. Asgarova, V. E. Ismailov

  579 - 588

  • pdf

• Legendre curves and the singularities of ruled surfaces obtained by using rotation minimizing frame

  M. Bekar, F. Hathout , Y. Yayli

  589 - 601

  • pdf

• Boundary-value problems with control for operator equations in Banach spaces

  О. A. Boichuk , V. P. Zhuravliov

  602 - 616

  • pdf (Ukrainian)

• On relative ranks of finite transformation semigroups with restricted range

  I. Dimitrova, J. Koppitz

  617 - 626

  • pdf

• Asymptotic behavior of a class of perturbed differential equations

  A. Dorgham, M. Hammi, M. A. Hammami

  627 - 639

  • pdf

• Existence of two-point oscillatory solutions of a relay nonautonomous system with a multiple eigenvalue of a real symmetric matrix

  V. V. Yevstafyeva

  640 - 650

  • pdf (Ukrainian)

• Conditions for the existence of basic solutions of linear multivalued differential equations

  T. A. Komleva, A. B. Plotnikov, L. I. Plotnikova, N. V. Skripnik

  651 - 673

  • pdf (Ukrainian)

• On stability of deformations of Cuntz – Toeplitz algebras

  K. A. Krutoi

  674 - 678

  • pdf (Ukrainian)

• A note on the uniqueness of certain types of differential-difference polynomials

  S. Majumder, S. Saha

  679 - 694

  • pdf

• On bounded solutions of a class of nonlinear integral equations on the plane and the Urysohn equation in a quadrant of the plane

  Kh. A. Khachatryan , H. S. Petrosyan

  695 - 711

  • pdf (Ukrainian)

• Determinantal evaluation of four Wronskian matrices

  W. Chu

  712 - 720

  • pdf