On the 85th birthday of Anatolii Mykhailovych Samoilenko (02.01.1938 – 04.12.2020), outstanding Ukraininan mathematician von Kushnir, R. M., Lukovs’kyi, I. O., Makarov , V. L., Marchenko, V. O., Pastur, L. A., Perestyuk, M. O., Tymokha, O. M., Khruslov, Ye. Ya., Boichuk, O. A., Gutlyanskii, V. Ya., Kochubei , A. N., Nikitin, A. G., Portenko, M. I., Parasyuk, I. O., Petryshyn, R. I., Ronto, M. I., Tkachenko, V. I., Trofymchuk, S. I., Kushnir, R. M., Lukovs’kyi, I. O., Makarov , V. L., Marchenko, V. O., Pastur, L. A., Perestyuk, M. O., Tymokha, O. M., Khruslov, Ye. Ya., Boichuk, O. A., Gutlyanskii, V. Ya., Kochubei , A. N., Nikitin, A. G., Portenko, M. I., Parasyuk, I. O., Петришин, Р. І., Ronto, M. I., Tkachenko, V. I., Trofymchuk, S. I.

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Sufficient conditions and radius problems for the Silverman class von Kumar, S. Sivaprasad, Priyanka, Priyanka, Kumar, S. Sivaprasad, Goel, Priyanka

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International conference “Theory of approximation of functions and its applications” on the occasion of the 80th birthday of the corresponding member of the National Academy of Sci... von Sokolenko, I., Соколенко, І.

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On the symplectic structure deformations related to the Monge–Ampère equation on the Kähler manifold $P_{2}(\mathbb{C})$ von Balinsky, A. A., Prykarpatski, A. K., Pukach, P. Ya., Vovk, M. I., Balinsky, A. A., Prykarpatski, A. K., Pukach, P. Ya., Vovk, M. I.

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Inequalities of the Markov–Nikolskii type in regions with zero interior angles in Bergman space von Özkartepe, P., Озкартепе, Пелiн

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Fixed-point theorem for an infinite Toeplitz matrix and its extension to general infinite matrices von Abramov, Vyacheslav M., Abramov, Vyacheslav M.

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A note on the mapping theorem of essential pseudospectra on a Banach space von Ammar, Aymen, Veeramani, S., Ammar, Aymen, Veeramani, S.

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On distortions of the transfinite diameter of disk image von Salimov, R., Vyhivska, L., Klishchuk, B., Салімов, Руслан, Вигівська, Людмила, Кліщук, Богдан

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On the Berezin number of operators on the reproducing kernel of Hilbert space and related questions von Yamancı, Ulaş, Karlı, Ismail M., Yamancı, Ulaş, Karlı, Ismail M.

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A fitted approximate method for solving singularly perturbed Volterra–Fredholm integro-differential equations with an integral boundary condition von Gunes, Baransel, Cakir, Musa, Gunes, Baransel, Cakir, Musa

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Some new Cesàro sequence spaces of order $\alpha$ von Savaşcı, Medine Yeşilkayagil, Başar, Feyzi, Savaşcı, Medine Yeşilkayagil, Başar, Feyzi

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Third Hankel determinant for the class of analytic functions defined by Mathieu-type series related to a petal-shaped domain von Panigrahi, T., Pattnayak, E., El-Ashwah, R. M., Panigrahi, T., Pattnayak, E., El-Ashwah, R. M.

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Measure pseudoasymptotically Bloch periodic functions in the sense of Stepanov and applications von Khemili, Youssef, Miraoui, Mohsen, Salah, Mounir Ben, Khemili, Youssef, Miraoui, Mohsen, Salah, Mounir Ben

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Convergence of Baum–Katz series for sums whose terms are elements of linear $m$ th order autoregressive sequence von Ilienko, M., Polishchuk, A., Ільєнко, Марина, Поліщук, Анастасія

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Method of local linear approximation in the theory of nonlinear impulsive systems von Perestyuk , М. О., Slyusarchuk, V. Yu., Перестюк, М. О., Слюсарчук, В. Ю., Slyusarchuk, V.

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Numerical continued fraction interpolation von Celis, Oliver Salazar, Celis, Oliver Salazar

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Cospectral quantum graphs in the case of Dirichlet conditions at pendant vertices von Pivovarchik, V., Chernyshenko, A., Пивоварчик, Вячеслав, Чернишенко, Анастасiя

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Periodic boundary-value problem for a Rayleigh-type equation unsolved with respect to the derivative von Chuiko , S., Nesmelova, O., Чуйко, Сергій, Нєсмєлова, Ольга

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A refinement of Schwarz's lemma at the boundary von Örnek, Bülent Nafi, Örnek, Bülent Nafi

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Optimal control over systems of functional-differential equations with infinite delay von Stanzhytskyi, О. М., Kichmarenko, O. D., Mogylova, V. V., Koval’chuk , T. V., Станжицький, О. М., Кічмаренко, О. Д., Могильова, В. В., Ковальчук, Т. В.

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