|
This article is cited in 3 scientific papers (total in 3 papers)
Almost Everywhere Divergent Subsequences of Fourier Sums of Functions from $\varphi(L)\cap H_1^\omega$
N. Yu. Antonov Institute of Mathematics and Mechanics, Ural Branch of the Russian Academy of Sciences
Abstract:
For a gap sequence of natural numbers $\{n_k\}^\infty_{k=1}$, for a nondecreasing function $\varphi\colon[0,+\infty)\to[0,+\infty)$ such that $\varphi(u)=o(u\ln\ln u)$ as $u\to\infty$, and a modulus of continuity satisfying the condition $(\ln k)^{-1}=O(\omega(n_k^{-1}))$, we present an example of a function $F\in\varphi(L)\cap H_1^\omega$ with an almost everywhere divergent subsequence $\{S_{n_k}(F,x)\}$ 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 $\varphi(L)\cap H_1^\omega$”, 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
|
Statistics & downloads: |
Abstract page: | 642 | Full-text PDF : | 225 | References: | 96 | First page: | 15 |
|