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
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
uend{array}ight);(Delta^{n-
u};mu_
u);frac{sin
u t}{t}.$$
Keywords: Hausdorff summability, Fourier series, Hausdorff transformation