Vol. 15 No. 1 (2023)

Scientific articles

• Inverse problems of determining an unknown depending on time coefficient for a parabolic equation with involution and periodicity conditions

  Ya.O. Baranetskij, I.I. Demkiv, A.V. Solomko

  5-19

  • Article
• On King type modification of $(p,q)$-Lupaş Bernstein operators with improved estimates

  K.S. Nisar, V. Sharma, A. Khan

  20-30

  • Article
• A study on conformal Ricci solitons and conformal Ricci almost solitons within the framework of almost contact geometry

  S. Dey

  31-42

  • Article
• Dynamical behavior of one rational fifth-order difference equation

  B. Ogul, D. Simsek

  43-51

  • Article
• Coefficient inverse problem for the strongly degenerate parabolic equation

  N.M. Huzyk, P.Y. Pukach, M.I. Vovk

  52-65

  • Article
• The crossing numbers of join products of eight graphs of order six with paths and cycles

  M. Staš

  66-77

  • Article
• Characteristics of linear and nonlinear approximation of isotropic classes of periodic multivariate functions

  A.S. Romanyuk, V.S. Romanyuk, K.V. Pozharska, S.B. Hembars'ka

  78-94

  • Article
• Some convergence results for nonlinear Baskakov-Durrmeyer operators

  H.E. Altin

  95-103

  • Article
• Spectra of algebras of analytic functions, generated by sequences of polynomials on Banach spaces, and operations on spectra

  S.I. Vasylyshyn

  104-119

  • Article
• Kenmotsu 3-manifolds and gradient solitons

  F. Mofarreh, U.C. De

  120-127

  • Article
• On fixed points of some multivalued mappings under certain function classes

  V. Karakaya, D. Sekman

  128-136

  • Article
• On some integral inequalities for $(h,m)$-convex functions in a generalized framework

  P. Kórus, J.E. Nápoles Valdés

  137-149

  • Article
• Polynomial composites and certain types of fields extensions

  Ł. Matysiak

  150-157

  • Article
• Accelerated Krasnoselski-Mann type algorithm for hierarchical fixed point and split monotone variational inclusion problems in Hilbert spaces

  G.C. Ugwunnadi, L.Y. Haruna, M.H. Harbau

  158-179

  • Article
• On Dirichlet series similar to Hadamard compositions in half-plane

  A.I. Bandura, O.M. Mulyava, M.M. Sheremeta

  180-195

  • Article
• A characterization for $B$-singular integral operator and its commutators on generalized weighted $B$-Morrey spaces

  J.J. Hasanov, I. Ekincioglu, C. Keskin

  196-211

  • Article
• On wavelet type Bernstein operators

  H. Karsli

  212-221

  • Article
• Local Polya fluctuations of Riesz gravitational fields and the Cauchy problem

  V.A. Litovchenko

  222-235

  • Article
• Applications of uniform boundedness principle to matrix transformations

  M.A. Sarıgöl

  236-245

  • Article
• Asymptotic estimates for the widths of classes of functions of high smothness

  A.S. Serdyuk, I.V. Sokolenko

  246-259

  • Article
• Fixed sets and fixed points for mappings in generalized $\rm Lim$-spaces of Fréchet

  V.F. Babenko, V.V. Babenko, O.V. Kovalenko

  260-269

  • Article
• A note on the Banach lattice $c_0( \ell_2^n)$, its dual and its bidual

  M.L. Lourenço, V.C.C. Miranda

  270-277

  • Article
• Topological transitivity of translation operators in a non-separable Hilbert space

  Z.H. Novosad

  278-285

  • Article
• Approximate properties of Abel-Poisson integrals on classes of differentiable functions defined by moduli of continuity

  Yu.I. Kharkevych, T.A. Stepaniuk

  286-294

  • Article
• New models for some free algebras of small ranks

  A.V. Zhuchok, G.F. Pilz

  295-305

  • Article
• Sub-Gaussian random variables and Wiman's inequality for analytic functions

  A.O. Kuryliak, O.B. Skaskiv

  306-314

  • Article