Estimates for the best approximations and approximation by Fourier sums of classes of convolutions of periodic functions of not high smoothness in integral metrics von T. A. Stepaniuk

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Approximation of the classes of generalized Poisson integrals by Fourier sums in metrics of the spaces L_s von A. S. Serdiuk, T. A. Stepaniuk

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Uniform approximations by Fourier sums on the classes of convolutions with generalized Poisson kernels von A. S. Serdiuk, T. A. Stepaniuk

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Estimates of the best orthogonal trigonometric approximations of the classes of convolutions of periodic functions of not high smoothness von A. S. Serdiuk, T. A. Stepaniuk

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Estimates of the best m-term trigonometric approximations of classes of analytic functions von A. S. Serdiuk, T. A. Stepaniuk

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Order Estimates for the Best Orthogonal Trigonometric Approximations of the Classes of Convolutions of Periodic Functions of Low Smoothness von A. S. Serdiuk, T. A. Stepaniuk

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Estimations of the Best Approximations for the Classes of Infinitely Differentiable Functions in Uniform and Integral Metrics von A. S. Serdiuk, T. A. Stepaniuk

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Order Estimates for the Best Approximations and Approximations by Fourier Sums in the Classes of Convolutions of Periodic Functions of Low Smoothness in the Uniform Metric von A. S. Serdiuk, T. A. Stepaniuk

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Order estimates for the best approximation and approximation by Fourier sums of classes of infinitely differentiable functions von A. S. Serdiuk, T. A. Stepaniuk

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Approximation of functions from the classes WrβHα by Weierstrass integrals von U. Z. Hrabova, I. V. Kalchuk, T. A. Stepaniuk

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Approximative properties of the Weierstrass integrals on the classes WrβHα von U. Z. Grabova, I. V. Kalchuk, T. A. Stepaniuk

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