About marginal values of three-harmonic Poisson integral on the bound of the unit disk by S. B. Hembars’ka, S. B. Hembars’ka

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On boundary values of three-harmonic Poisson integral on the boundary of a unit disk by S. B. Hembarska

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Linear and Kolmogorov widths of the classes BΩp,θ of periodic functions of one and several variables by M. V. Hembarskyi, S. B. Hembarska

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Approximate characteristics of the classes BΩ,p,θ of periodic functions of one variable and many ones by M. V. Hembarskyi, S. B. Hembarska

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Widths of the classes BΩr,θ of periodic functions of many variables in the space B1,1 by M. V. Hembarskyi, S. B. Hembarska

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Approximative properties of biharmonic Poisson integrals on Hölder classes by S. B. Hembarska, K. M. Zhyhallo

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Best orthogonal trigonometric approximations of the Nikol'skii–Besov-type classes of periodic functions in the space B∞,1 by S. B. Hembarska, P. V. Zaderei

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Approximation characteristics of the Nikol'sky-Besov-type classes of periodic single- and multivariable functions in the B_ by S. B. Hembarska, O. V. Fedunyk-Yaremchuk

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Characteristics of the linear and nonlinear approximations of the Nikol'skii-Besov-type classes of periodic functions of several variables by S. B. Hembarska, I. A. Romaniuk, O. V. Fedunyk-Yaremchuk

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