On the extension of even-positive-definite functions of one and two variables by Lopotko, O. V., Лопотко, О. В., Лопотко, О. В.

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Differentiability of integrals of real functions with respect to $L_0$-valued measures by Radchenko, V. N., Радченко, В. Н., Радченко, В. Н.

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Finite-dimensional approximations of diffusion measures in a Hilbert space by Bondarenko, V. G., Бондаренко, В. Г., Бондаренко, В. Г.

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A critical case of stability of one quasilinear difference equation of the second order by Vitrychenko, I. E., Витриченко, И. Е., Витриченко, И. Е.

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A multipoint problem for partial differential equations unresolved with respect to the higher time derivative by Klyus, I. S., Ptashnik, B. I., Клюс, І. С., Пташник, Б. Й.

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Structure of certain classes of groups with locally cyclic Abelian subgroups by Kuzennyi, N. F., Maznichenko, S. V., Кузенний, М. Ф., Мазніченко, С. В.

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On lower bounds for the approximation of individual functions by local splines with nonfixed nodes by Ligun, A. A., Shumeiko, A. A., Лигун, А. А., Шумейко, А. А., Лигун, А. А., Шумейко, А. А.

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Direct methods for the approximate solution of systems of singular integral equations in the case of nonnegative partial indices by Malyshev, К. I., Малышев, К. И., Малышев, К. И.

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Technical stability of autonomous control systems with variable structure by Matviichuk, K. S., Матвійчук, К. С.

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Essentially unstable solutions of difference equations by Slyusarchuk, V. E., Слюсарчук, В. Е., Слюсарчук, В. Е.

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Rate of convergence of a group of deviations on sets of $\bar{\psi}$−integrals by Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Systems of singularly perturbed degenerate integro-differential equations by Zavizion, G. V., ShkiI, N. I., Завизион, Г. В., Шкиль, Н. И., Завизион, Г. В., Шкиль, Н. И.

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On the structure of the set of nonwandering points of a pair of coupled quadratic maps by Dobrynskii, V. A., Добрынский, В. А., Добрынский, В. А.

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Investigation of smoothness conditions on the boundary for the strong linear convexity of a domain by Mel’nik, V. L., Мельник, В. Л.

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Co-adjoint orbits of compact Lie groups and generalized stereographic projection by Skrypnik, T. V., Скрипник, Т. В., Скрипник, Т. В.

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On the best $m$-term trigonometric and orthogonal trigonometric approximations of functions from the classes $L^{Ψ}_{β,ρ}$ by Fedorenko, A. S., Федоренко, А. С.

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Index of volume 51 of „Ukrainian Mathematical Journal" by EditorialBoard, Редколегія

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On differentiability of open mappings by Bondar, A. V., Бондар, А. В.

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Generalized and classical almost periodic solutions of Lagrangian systems convex on a compact set by Zakharin, S. F., Parasyuk, I. O., Захарін, С. Ф., Парасюк, І. О.

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Random integral manifolds of systems of differential equations with unbounded operator in a Banach space by Kolomiyets, V. G., Mel'nikov, A. I., Коломиец, В. Г., Мельников, А. И., Коломиец, В. Г., Мельников, А. И.

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