Journal of Inequalities and Applications, cilt.2010, 2010 (SCI-Expanded)
We establish a summability factor theorem for summability |A, δ| K, where A is lower triangular matrix with nonnegative entries satisfying certain conditions. This paper is an extension of the main result of the work by Rhoades and Sava (2006) by using quasi f-increasing sequences. Copyright © 2010 E. Sava.