Quadruples of orthoprojectors connected by a linear relationship by Yusenko, A. A., Юсенко, А. А.

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Nonuniqueness of the solution of the gellerstedt space problem for one class of many-dimensional hyperbolic-elliptic equations by Aldashev, S. A., Алдашев, С. А., Алдашев, С. А.

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Example of a function of two variables that cannot be an $R$-function by Velichko, I. G., Stegantseva, P. G., Величко, И. Г., Стеганцева, П. Г., Величко, И. Г., Стеганцева, П. Г.

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Block-diagonal reduction of matrices over an $n$-simple Bézout domain $(n ≥ 3)$ by Domsha, O.V., Zabavskii, B. V., Домша, О. В., Забавський, Б. В.

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Integral representation of even positive-definite functions of one variable by Lopotko, O. V., Лопотко, О. В.

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On conditions for the discreteness of the spectrum of a semiinfinite Jacobi matrix with zero diagonal by Masmaliev, G. M., Khanmamedov, A. Kh., Масмалиев, Г. М., Ханмамедов, А. Х., Масмалиев, Г. М., Ханмамедов, А. Х.

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Letter to the editor by Savchuk, V. V., Савчук, В. В.

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Algebraic polynomials least deviating from zero in measure on a segment by Arestov, V. V., Арестов, B. В., Арестов, B. В.

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Sharp Kolmogorov-type inequalities for norms of fractional derivatives of multivariate functions by Babenko, V. F., Parfinovych, N. V., Pichugov, S. A., Бабенко, В. Ф., Парфінович, Н. В., Пічугов, С. О.

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On Hankel determinants of functions given by their expansions in $P$-fractions by Buslaev, V. I., Буслаев, В. И., Буслаев, В. И.

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On the relation between measures defining the Stieltjes and the inverted Stieltjes functions by Gilewicz, J., Pindor, M., Гілевич, Я. Я., Піндор, М.

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On one result of J. Bourgain by Konyagin, S. V., Shkredov, I. D., Конягин, С. В., Шкредов, И. Д., Конягин, С. В., Шкредов, И. Д.

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Are the degrees of the best (co)convex and unconstrained polynomial approximations the same? II by Kopotun, K. A., Leviatan, D., Shevchuk, I. A., Коротун, К. А., Левіатан, Д., Шевчук, І. О.

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Quantitative form of the Luzin $C$-property by Krotov, V. G., Кротов, В. Г., Кротов, В. Г.

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Best approximation by ridge functions in $L_p$-spaces by Maiorov, V. E., Майоров, В. Є.

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One-sided approximation of a step by algebraic polynomials in the mean by Motornaya, O. V., Motornyi, V. P., Nitiema, P. K., Моторная, О. В., Моторный, В. П., Нитиема, П. К., Моторная, О. В., Моторный, В. П., Нитиема, П. К.

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On relative widths of classes of differentiable functions. II by Subbotin, Yu. N., Telyakovskii, S. A., Субботин, Ю. H., Теляковский, С. А., Субботин, Ю. H., Теляковский, С. А.

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Kernels of derivations of polynomial rings and Casimir elements by Bedratyuk, L. P., Бедратюк, Л. П.

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On the modularity of a lattice of $τ$-closed $n$-ultiply $ω$-composite formations by Vorob'ev, N. N., Tsarev, A. A., Воробьев, Н. Н., Царёв, A. A., Воробьев, Н. Н., Царёв, A. A.

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On relative ranks of finite transformation semigroups with restricted range by Dimitrova, I., Koppitz, J., I., Dimitrova, I., Koppitz, J.

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