Order estimates for the best approximation and approximation by Fourier sums of classes of infinitely differentiable functions von Serdyuk, A. S., Stepanyuk, T. A., Сердюк, А. С., Степанюк, Т. А.

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An approximation of class of convolutions of periodic functions by linear methods based on their Fourier-Lagrange coefficients von Serdyuk, A. S., Sokolenko, I. V., Сердюк, А. С., Соколенко, І. В.

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Estimates from below for Kolmogorov widths in classes of Poisson integral von Serdyuk, A. S., Bodenchuk, V. V., Сердюк, А. С., Боденчук, В. В.

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Estimates of uniform approximations by Zygmund sums on classes of convolutions of periodic functions von Serdyuk, A. S., Grabova, U. Z., Сердюк, А. С., Грабова, У. З.

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Approximation by linear methods of classes of $(\psi,\bar\beta)-$differentiable functions. von Serdyuk, A. S., Sokolenko, I. V., Сердюк, А. С., Соколенко, І. В.

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Approximation of classes $(\psi,\bar\beta)$-differentiable functions by interpolating trigonometric polynomials von Serdyuk, A. S., Sokolenko, I. V., Сердюк, А. С., Соколенко, І. В.

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