Modulation stability of wave-packets in a three-layer fluid by D. S. Kharchenko, V. V. Naradovyi

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On the 85th birthday of Anatolii Mykhailovych Samoilenko (02.01.1938–04.12.2020), outstanding Ukraininan mathematician by R. M. Kushnir, I. O. Lukovskyi, V. L. Makarov, V. O. Marchenko, L. A. Pastur, M. O. Perestiuk, O. M. Tymokha, Ye. Ya. Khruslov, O. A. Boy̆chuk, Ya. Hutlianskyy̆

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Study of quantum Ostrowski's-type inequalities for differentiable convex functions by M. A. Ali, M. Fečkan, A. Mateen

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On the symplectic structure deformations related to the Monge–Ampère equation on the Kähler manifold P2(C) by A. A. Balinsky, A. K. Prykarpatski, P. Y. Pukach, M. I. Vovk

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Least-squares method in the theory of nonlinear boundary-value problems unsolved with respect to the derivative by P. Benner, S. Chuiko, O. Nesmelova

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Solvability of integrodifferential equations with nondegenerate kernel in Hilbert spaces by O. A. Boichuk, V. P. Zhuravlov

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Almost periodic solutions of damping wave equation with impulsive action by A. V. Dvornyk, V. I. Tkachenko

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Realization of the exact three-point finite-difference schemes for the system of second-order ordinary differential equations by V. L. Makarov, N. V. May̆ko, V. L. Riabichev

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On the solvability of Fredholm boundary-value problems in fractional Sobolev spaces by V. A. Mykhailets, O. M. Atlasiuk, T. B. Skorobohach

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Method of local linear approximation in the theory of nonlinear impulsive systems by M. O. Perestiuk, V. Y. Sliusarchuk

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On the jump control problem for boundary-value problems with state-dependent impulses by A. Rontó, M. Rontó, N. Rontoová

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Optimal control over systems of functional-differential equations with infinite delay by O. M. Stanzhytskyy̆, O. D. Kichmarenko, V. V. Mohylova, T. V. Kovalchuk

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Two different sequences of infinitely many homoclinic solutions for a class of fractional Hamiltonian systems by A. Benhassine

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On a proximal point algorithm for solving minimization problem and common fixed point problem in CAT(k) spaces by C. Garodia, S. Radenovic

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Bojanov–Naidenov problem for differentiable functions and the Erdös problem for polynomials and splines by V. Kofanov

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Sharp initial coefficient bounds and the Fekete–Szegö problem for some certain subclasses of analytic and bi-univalent functions by A. B. Patil, T. G. Shaba

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On distortions of the transfinite diameterof disk image by R. Salimov, L. Vyhivska, B. Klishchuk

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Group of units of finite group algebras of groups of order 24 by M. Sahai, S. F. Ansari

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Periodic Coulomb dynamics of three equal negative charges in the field of six equal positive charges fixed in octahedron vertices by V. Skrypnyk

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Interval rearrangement ensembles by O. Teplinskyy̆

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