Lower bounds for Kolmogorov widths in classes of convolutions with Neumann kernel von Bodenchuk, V. V., Боденчук, В. В.

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Estimates from below for Kolmogorov widths in classes of Poisson integral von Serdyuk, A. S., Bodenchuk, V. V., Сердюк, А. С., Боденчук, В. В.

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