Approximate properties of the de la Vallée Poussin means for the discrete Fourier-Jacobi sums.

Korkmasov, F.M.

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We investigate approximation properties of de la Vallee Poussin right-angled sums on the classes of periodic functions of several variables with a high smoothness. We obtain integral presentations of deviations of de la Vallee Poussin sums on the classes $C_{β, \infty}^{m α}$ .