A theorem of Bosanquet states that the Fourier series of a 2?-periodic function of bounded variation is absolutely (C, :) summable. In this paper we give a quantitative version of Bosanquet's result.
A Structure Theorem for the Absolute RIESZ Summability of FOURIER Series
β Scribed by B. D. Malviya
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- English
- Weight
- 292 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0025-584X
No coin nor oath required. For personal study only.
β¦ Synopsis
of Denton (Texas) (Eingegangen am 4.6. 1971)
1. Definitions
Let a, be a giveninfinite series and let A, = il (n) be a positive inonotonic function of n tending t o infinity with n. We write
The series z c n , i s said to he summable (R, An, r ) , r 2 0, t o sum s, if A > ( w ) / w ' --+ s, as OJ 00, and is said to be absolutely summuble (R, A$%, r ) or summable IR, A,,, r 1, r 2 0 if A;(w),'cu' is of bounded variation in ( A , m ) ,
π SIMILAR VOLUMES
N . WIENER remarked that a non-identically vanishing real function and its Fourier transform cannot both decay "very fast". It was HAR.DY who specified and proved this assertion in 1933. In the present paper Hardy's theorem will be generalized. Moreover, it will be shown that further weakening of th
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