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JMB Journal of Microbiolog and Biotechnology

OPEN ACCESS eISSN 0454-8124
pISSN 1225-6951
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Original Article

Kyungpook Mathematical Journal 2003; 43(4): 513-518

Published online December 23, 2003

Copyright © Kyungpook Mathematical Journal.

On $(H, mu_n)$ Summability of Fourier Series

Satish Chandra

Department of Mathematics, S. M. Post-Graduate College, Chandausi - 202412, India

Abstract

In this paper, we have proved a theorem on Hausdorff summability of Fourier series which generalizes various known results. We prove that if $$int_{0}^{t};mid phi(u)mid;du~=~o(t) ~~{m as}~~ t o 0 ~~{m and}~~ lim_{n oinfty}int_{pi/n}^{eta}frac{mid phi(t)-phi(t+pi/n)mid}{t};dt~=~o(n)$$ where $0 u=0}^{n};left(egin{array}{ll}n\
uend{array}ight);(Delta^{n-
u};mu_
u);frac{sin
u t}{t}.$$

Keywords: Hausdorff summability, Fourier series, Hausdorff transformation