Modulation stability of wave-packets in a three-layer fluid von 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 von 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 von 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) von 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 von P. Benner, S. Chuiko, O. Nesmelova

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

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Almost periodic solutions of damping wave equation with impulsive action von 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 von 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 von 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 von M. O. Perestiuk, V. Y. Sliusarchuk

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

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Optimal control over systems of functional-differential equations with infinite delay von 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 von A. Benhassine

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

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Bojanov–Naidenov problem for differentiable functions and the Erdös problem for polynomials and splines von 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 von A. B. Patil, T. G. Shaba

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

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Group of units of finite group algebras of groups of order 24 von 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 von V. Skrypnyk

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Interval rearrangement ensembles von O. Teplinskyy̆

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