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This article is cited in 3 scientific papers (total in 3 papers)
Almost Everywhere Divergent Subsequences of Fourier Sums of Functions from φ(L)∩Hω1
N. Yu. Antonov Institute of Mathematics and Mechanics, Ural Branch of the Russian Academy of Sciences
Abstract:
For a gap sequence of natural numbers {nk}∞k=1, for a nondecreasing function φ:[0,+∞)→[0,+∞) such that φ(u)=o(ulnlnu) as u→∞, and a modulus of continuity satisfying the condition (lnk)−1=O(ω(n−1k)), we present an example of a function F∈φ(L)∩Hω1 with an almost everywhere divergent subsequence {Snk(F,x)} of the sequence of partial sums of the trigonometric Fourier series of the function F.
Keywords:
Fourier sum, gap sequence, trigonometric Fourier series, modulus of continuity, Dirichlet kernel, Lebesgue measurability, Jensen's inequality.
Received: 15.01.2008 Revised: 04.07.2008
Citation:
N. Yu. Antonov, “Almost Everywhere Divergent Subsequences of Fourier Sums of Functions from φ(L)∩Hω1”, Mat. Zametki, 85:4 (2009), 502–515; Math. Notes, 85:4 (2009), 484–495
Linking options:
https://www.mathnet.ru/eng/mzm6640https://doi.org/10.4213/mzm6640 https://www.mathnet.ru/eng/mzm/v85/i4/p502
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Abstract page: | 687 | Full-text PDF : | 262 | References: | 110 | First page: | 15 |
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