Research articles

• $\sigma$-Centralizers of triangular algebras

  M. Ashraf, M. A. Ansari

  435 - 446

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• Robin boundary-value problem for the Beltrami equation

  I. Gençtürk

  447 - 454

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• Some commutativity criteria for prime rings with involution involving symmetric and skew symmetric elements

  N. A. Dar, S. Ali, A. Abbasi, M. Ayedh

  455 - 466

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• Some limit theorems for the critical Galton–Watson branching processes

  Kh. Kudratov, Ya. Khusanbaev

  467 - 477

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• Nonexistence results for a system of nonlinear fractional integro-differential equations

  A. Mugbil

  478 - 490

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• $d$-Gaussian Fibonacci, $d$-Gaussian Lucas polynomials and their matrix representations

  E. Özkan, M. Uysal

  491 - 510

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• On Hölder continuity of solutions of the Beltrami equations

  V. Ryazanov, R. Salimov, E. Sevost’yanov

  511 - 522

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• Stochastic Navier–Stokes variational inequalities with unilateral boundary conditions: probabilistic weak solvability

  M. Sango

  523 - 541

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• Uniform approximations by Fourier sums on the sets of convolutions of periodic functions of high smoothness

  A. Serdyuk, T. Stepaniuk

  542 - 567

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• On the polyconvolution with the weight function $\gamma(y)=\cos y$ of Hartley integral transforms $\mathcal H_1,$ $\mathcal H_2,$ $\mathcal H_1$ and integral equations

  N. M. Khoa, T. V. Thang

  568 - 576

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