A New Sufficient Condition for Belonging to the Algebra of Absolutely Convergent Fourier Integrals and Its Application to the Problems of Summability of Double Fourier Series by Kotova, O. V., Trigub, R. M., Котова, О. В., Тригуб, Р. М., Котова, О. В., Тригуб, Р. М.

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$p$-Regularity Theory. Tangent Cone Description in the Singular Case by Prusińska, A., Tret’yakov, A., Прусінска, А., Третьяков, А.

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Certain Regularity of the Entropy Solutions for Nonlinear Parabolic Equations with Irregular Data by Li, Fengquan, Лі, Фенґяуан

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Existence of the Category $DTC_2 (K)$ Equivalent to the Given Category $KAC_2$ by Khan, M. S., Хан, М. С.

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On Bijective Continuous Images of Absolute Null Sets by Kharazishvili, A. B., Харазішвілі, А. Б.

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Approximating Characteristics of the Classes $L_{β,p}^{ψ}$ of Periodic Functions in the Space $L_q$ by Shkapa, V. V., Шкапа, В. В.

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Volodymyr Semenovych Korolyuk (on his 90th birthday) by Bratiichuk, N. S., Gusak, D. V., Kovalenko, I. N., Lukovsky, I. O., Makarov, V. L., Samoilenko, I. V., Samoilenko, A. M., Братійчук, М. С., Гусак, Д. В., Коваленко, І. М., Луковський, І. О., Макаров, В. Л., Самойленко, І. В., Самойленко, А. М.

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A New Characterization of PSL($2, q$) for Some $q$ by Amiri, S. S. S., Asboei, A. K., Iranmanesh, A., Аміри, С. С. С., Асбо, А. К., Іранманеш, А.

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On the Optimal Recovery of Integrals of Set-Valued Functions by Babenko, V. F., Babenko, V. V., Polishchuk, M. V., Бабенко, В. Ф., Бабенко, В. В., Поліщук, М. В.

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Laplacian Generated by the Gaussian Measure and Ergodic Theorem by Bogdanskii, Yu. V., Sanzharevskii, Ya. Yu., Богданский, Ю. В., Санжаревский, Я. Ю., Богданский, Ю. В., Санжаревский, Я. Ю.

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Perturbation Theory of Operator Equations in the FréChet and Hilbert Spaces by Boichuk, О. A., Pokutnyi, О. О., Бойчук, А. А., Покутный, А. А., Бойчук, А. А., Покутный, А. А.

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One Problem Connected with the Helgason Support Problem by Volchkov, V. V., Volchkov, V. V., Savost’yanova, I. M., Волчков, В. В., Волчков, Вит. В., Савостьянова, И. М., Волчков, В. В., Волчков, Вит. В., Савостьянова, И. М.

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Homogenized Model of Diffusion in Porous Media with Nonlinear Absorption on the Boundary by Goncharenko, M. V., Khilkova, L. O., Гончаренко, М. В., Хилькова, Л. А., Гончаренко, М. В., Хилькова, Л. А.

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Classes of Analytic Functions Defined by a Differential Operator Related to Conic Domains by Deniz, E., Orhan, H., Sokół, J., Деніз, Е., Орхан, Х., Сокол, Й.

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Relative Extensions of Modules and Homology Groups by Mao, Lixin, Zhu, Haiyan, Мао, Ліхін, Жу, Хайян

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On the $C^{*}$-Algebra Generated by the Bergman Operator, Carleman Second-Order Shift, and Piecewise Continuous Coefficients by Mozel’, V. A., Мозель, В. А., Мозель, В. А.

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Multiple Haar Basis and its Properties by Romanyuk, V. S., Романюк, В. С.

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On the Best Linear Approximation Method for Hölder Classes by Skorokhodov, D. S., Скороходов, Д. С., Скороходов, Д. С.

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Asymptotic Representations for the Solutions of One Class of Nonlinear Differential Equations of the Second Order by Shlepakov, O. R., Шлепаков, О. Р., Шлепаков, О. Р.

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Ivan Oleksandrovych Lukovs’kyi (on his 80th birthday) by EditorialBoard, Редколегія

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