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Cesàro Means of Trigonometric Fourier Series

Cesàro Means of Trigonometric Fourier Series L. Zhizhiashvili proved that if for some 𝑝, 1 ≤ 𝑝 ≤ ∞, and α ∈ (0, 1), then the 𝐿 𝑝 -deviation of 𝑓 from its Cesàro mean is 𝑂(𝑛 α 𝑤(1/𝑛)) where 𝑤(·) is a modulus of continuity. In this paper we show that this estimation is non-amplifiable for 𝑝 = 1. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Georgian Mathematical Journal de Gruyter

Cesàro Means of Trigonometric Fourier Series

Georgian Mathematical Journal , Volume 9 (1) – Mar 1, 2002

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Publisher
de Gruyter
Copyright
© Heldermann Verlag
ISSN
1072-947X
eISSN
1072-9176
DOI
10.1515/GMJ.2002.53
Publisher site
See Article on Publisher Site

Abstract

L. Zhizhiashvili proved that if for some 𝑝, 1 ≤ 𝑝 ≤ ∞, and α ∈ (0, 1), then the 𝐿 𝑝 -deviation of 𝑓 from its Cesàro mean is 𝑂(𝑛 α 𝑤(1/𝑛)) where 𝑤(·) is a modulus of continuity. In this paper we show that this estimation is non-amplifiable for 𝑝 = 1.

Journal

Georgian Mathematical Journalde Gruyter

Published: Mar 1, 2002

Keywords: Trigonometric Fourier series; Cesàro means

There are no references for this article.