Abstract:
For a function f∈L1(T), we investigate the sequence
(C,1) of mean values Φ(|Sk(x,f)−f(x)|), where Φ(t):[0,+∞)→[0,+\nobreak∞), Φ(0)=\nobreak0, is a
continuous increasing function. We prove that if Φ increases faster
than exponentially, then these means can diverge everywhere. Divergence
almost everywhere of such means was established earlier.
Keywords:
Fourier series, means of Fourier series, the space L1(T).
This publication is cited in the following 12 articles:
Lars-Erik Persson, George Tephnadze, Ferenc Weisz, Martingale Hardy Spaces and Summability of One-Dimensional Vilenkin-Fourier Series, 2022, 71
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