Approximation of conjugate periodic functions by their three-harmonic Poisson integrals von U. Z. Grabova

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Uniform approximations by the threeharmonic Poisson integrals on the Sobolev classes von U. Z. Grabova

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Approximative properties of the threeharmonic Poisson integrals on the Hцlder classes von U. Z. Grabova

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Uniform approximations of functions of Lipschitz class by threeharmonic Poisson integrals von U. Z. Grabova

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Generalized Poisson integral and its applied aspects von U. Z. Grabova, S. A. Salnikova

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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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