Approximations of entire functions by polynomials of the best standard approximation за авторством V. A. Voitovych

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Estimates for the Approximations of the Classes of Analytic Functions by Interpolation Analogs of the De-La-Vallйe–Poussin Sums за авторством V. A. Voitovych

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Lebesgue type inequalities for interpolation analogues of Valle Poussin sums on sets of infinitely differentiable functions за авторством V. A. Voitovych, V. A. Musiienko

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Lebesgue type inequalities for the de la Vallйe Poussin sums and their interpolation analogues on classes of (ψ,β)-differentiable functions за авторством V. A. Voitovych, A. P. Musiienko

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