Classification and Approximation of Periodic Functions von Stepanets, A. I, Stepanets, Alexander I

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Solution of the Kolmogorov-Nikol'skii problem for the Poisson integrals of continuous functions von Stepanets, A I

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Approximation by fourier sums and best approximations on classes of analytic functions von Stepanets’, A. I., Serdyuk, A. S.

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Best approximations of integrals by integrals of finite rank von Stepanets, A.I., Shidlich, A.L.

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Extremal problems for numerical series von Stepanets, A. I.

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Problems of approximation theory in linear spaces von Stepanets, A. I.

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

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Best n-Term Approximations with Restrictions von Stepanets, A. I.

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Extremal problems for integrals of non-negative functions von Stepanets, Alexander I, Shidlich, Andrey L

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Classification of infinitely differentiable periodic functions von Stepanets, A. I., Serdyuk, A. S., Shidlich, A. L.

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Best Approximations of q-Ellipsoids in Spaces S p,μϕ von Stepanets, A. I.

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Extremal Problems of Approximation Theory in Linear Spaces von Stepanets, A. I.

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On relationship between classes of -differentiable functions and Gevrey classes von Stepanets, A. I., Serdyuk, A. S., Shidlich, A. L.

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Multiple Fourier sums and ϕ-strong means of their deviations on the classes of $$\bar \psi $$ -differentiable functions of many variables von Stepanets, A. I., Lasuriya, R. A.

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On the orders of the best approximations of integrals of functions by integrals of rank σ von Stepanets, A. I., Shidlich, A. L.

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Solution of the Kolmogorov-Nikol'skii problem for the Poisson integrals of continuous functions von Stepanets, A I

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Several statements for convex functions von Stepanets, A. I.

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Best approximations of infinitely differentiable functions in the space Ls von Stepanets, A. I.

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Rate of convergence of a group of deviations on sets of $$\bar \psi - {\rm{INTEGRALS}} von Stepanets, A. I.

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Approximate properties of the Zygmund method von Stepanets, A. I.

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