Problems of approximation theory in linear spaces von Stepanets, O. I., Степанець, О. І.

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Approximation of Convolution Classes by Fourier Sums. New Results von Stepanets, O. I., Степанець, О. І.

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Approximations in spaces of locally integrable functions von Stepanets, O. I., Степанець, О. І.

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Approximation of locally integrable functions on the real line von Stepanets, O.I., Wang Kunyang, Zhang Xirong

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Best $n$-Term Approximations with Restrictions von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Best Approximations of $q$-Ellipsoids in Spaces $S_{ϕ}^{p,μ}$ von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Extremal Problems of Approximation Theory in Linear Spaces von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Approximation Characteristics of Spaces $S_\phi ^p$ von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Approximation Characteristics of the Spaces $S_p^{ϕ}$ in Different Metrics von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Approximate properties of the Zygmund method von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Several statements for convex functions von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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

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Approximation of $\bar {\psi} - \text{Integrals}$ of periodic functions by Fourier sums (small smoothness). IIof periodic functions by Fourier sums (small smoothness). II von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Approximation of $\bar {\psi} - integrals$−integrals of periodic functions by Fourier sums (small smoothness). Iof periodic functions by Fourier sums (small smoothness). I von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Rate of convergence of Fourier series on the classes of $\overline{\psi}$-integrals von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Inverse theorems on approximation of periodic functions von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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Approximation of cauchy-type integrals in Jordan domains von Stepanets, O. I., Степанец, А. И., Степанец, А. И.

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On some properties of convex functions von Stepanets, O. I., Shydlich, A. L., Степанець, О. І., Шидліч, А. Л.

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On one extremal problem for positive series von Stepanets, O. I., Shydlich, A. L., Степанець, О. І., Шидліч, А. Л.

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Approximation of the $\bar {\Psi}$ -integrals of functions defined on the real axis by Fourier operators von Sokolenko, I. V., Stepanets, O. I., Соколенко, І. В., Степанець, О. І.

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