Pointwise approximation of functions by matrix operators of their Fourier series with r-differences of the entries,Lithuanian Mathematical Journal

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Pointwise approximation of functions by matrix operators of their Fourier series with r-differences of the entries
Lithuanian Mathematical Journal ( IF 0.4 ) Pub Date : 2020-10-01 , DOI: 10.1007/s10986-020-09501-w
Włodzimierz Łenski , Bogdan Szal

We extend the results of Xh. Z. Krasniqi [Acta Comment. Univ. Tartu. Math. 17 (2013), 89-101] and the authors [Acta Comment. Univ. Tartu. Math. 13 (2009), 11-24]. to the case where in the measures of estimations there are used $r$-differences of the entries.

中文翻译：

通过其傅立叶级数的矩阵算子对函数进行逐点逼近，并具有条目的 r 差

我们扩展了 Xh 的结果。Z. Krasniqi [Acta 评论。大学塔尔图。数学。17 (2013), 89-101] 和作者 [Acta Comment。大学塔尔图。数学。13 (2009), 11-24]。对于在估计量度中使用 $r$-条目差异的情况。

更新日期：2020-10-01

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