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Proceedings of the Yerevan State University, series Physical and Mathematical Sciences, 2016, Issue 1, Pages 22–29 (Mi uzeru94)  

Mathematics

On quasi-universal Walsh series in $L^p_{[0,1]}$, $p\in[1,2]$

R. G. Melikbekyan

Yerevan State University
References:
Abstract: Let the sequence $\{a_{k}\}_{k=1}^{\infty},$ $a_{k}\searrow0$ with $\{a_{k}\}_{k=1}^{\infty}\notin l_{2},$ and Walsh system $\{W_{k}(x)\}_{k=0}^{\infty}$ be given. Then for any $\epsilon>0$ there exists a measurable set $E\subset\lbrack0,1]$ with measure $|E|>1-\epsilon$ and numbers $\delta_{k}=\pm1, 0$ such that for any $p\in\lbrack1,2]$ and each function $f(x)\in L^{p}(E)$ there exists a rearrangement $k\to\sigma(k)$ such that the series $\displaystyle\sum _{k=1}^{\infty}\delta_{\sigma(k)}a_{\sigma(k)}W_{\sigma(k)}(x)$ converges to $f(x)$ in the norm of $L^{p}(E)$.
Keywords: Walsh system, quasi universal series.
Received: 11.12.2015
Accepted: 24.02.2016
Document Type: Article
MSC: 42C20
Language: English
Citation: R. G. Melikbekyan, “On quasi-universal Walsh series in $L^p_{[0,1]}$, $p\in[1,2]$”, Proceedings of the YSU, Physical and Mathematical Sciences, 2016, no. 1, 22–29
Citation in format AMSBIB
\Bibitem{Mel16}
\by R.~G.~Melikbekyan
\paper On quasi-universal Walsh series in $L^p_{[0,1]}$, $p\in[1,2]$
\jour Proceedings of the YSU, Physical and Mathematical Sciences
\yr 2016
\issue 1
\pages 22--29
\mathnet{http://mi.mathnet.ru/uzeru94}
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