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On a property of functional series
B. S. Kashin M. V. Lomonosov Moscow State University
Abstract:
The question of the convergence of functional series everywhere in the segment $[0, 1]$ is considered. Let $F=\{f\}$ be the set of such functions in $[0, 1]$ for each of which there is a transposition of the series $\sum_{k=1}^\infty f_k(x)$, which converges to it everywhere in $[0, 1]$. An example of a series is constructed such that the set $F$ consists just of an identical zero, but $\sum_{k=1}^\infty|f_k(x_0)|=\infty$ ($x_0\in[0,1]$) for any point of the segment $[0, 1]$.
Received: 20.05.1971
Citation:
B. S. Kashin, “On a property of functional series”, Mat. Zametki, 11:5 (1972), 481–490; Math. Notes, 11:5 (1972), 294–299
Linking options:
https://www.mathnet.ru/eng/mzm9814 https://www.mathnet.ru/eng/mzm/v11/i5/p481
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Abstract page: | 306 | Full-text PDF : | 83 | First page: | 1 |
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