K-functionals and extreme problems of the theory of approximation of the classes of analytic functions in a circle. II von S. B. Vakarchuk, M. B. Vakarchuk

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On the estimates of the values of various widths of classes of functions of two variables in the weight space L2,г(R2), г=exp(−x2 − y2) von S. B. Vakarchuk, M. B. Vakarchuk

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On total moduli of continuity for 2periodic functions of two variables in the space L_(2,2) von S. B. Vakarchuk, M. B. Vakarchuk

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Best approximation by "angles" of analytic in the unit bidisk functions von S. B. Vakarchuk, M. B. Vakarchuk

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K-functionals and extreme problems of the theory of approximation for classes of analytic functions in the circle. I von S. B. Vakarchuk, M. B. Vakarchuk

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