An application of a method of summability to Fourier series
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http://siba-ese.unisalento.it/index.php/notemat/article/view/29053/23807
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资源简介：
Applying $r$-repeated de la Vallée Poussin sums, we have proved four theorems which show the upper bound of the $r$-repeated de la Vall\'ee Poussin kernel, their convergence at a point, the deviation between a continuous function and the $r$-repeated de la Vallée Poussin sums of partial sums of its Fourier series, and finally we determine the degree of approximation of functions belonging to ordinary Lipschitz class.
提供机构：
University of Salento
创建时间：
2024-09-02
