Approximation to continuous functions
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On the relation between the summability methods and of double series
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On some summability methods of the Abel type
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Some properties of summability methods of the Abel type. IV
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On the equivalence of logarithmic methods of summabi lity of orthonormal series
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On the summability of numerical and orthogonal series by the (B,n)-method
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On some summability methods of conjugate trigonometric series
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Application of the Abel means of trigonometric Fourier series for differential equations of the Laplace type
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On the absolute and strong summability of numerical and orthogonal series by the methods connected with the Dirichlet problem for an elliptic domain
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On the summability of series by harmonic methods
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On the application of the Fourier-Legendre series for the Laplace equation
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On the summability methods connected with the Dirichlet problem for an elliptic domain
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Approximation of functions of two variables by some operators in weighted spaces
The Baskakov operators for functions of two variables.
Approximation theorems for functions of Hölder classes
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On the limit properties of the Picard singular integral.
Approximation by modified Szász-Mirakyan operators.
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