Characterization on some absolute summability factors of infinite series.
In the paper, we prove two theorems on summability, , of orthogonal series. Several known and new results are also deduced as corollaries of the main results.
In this paper a theorem on summability factors, which generalizes a theorem of Mishra and Srivastava [MS] on summability factors, has been proved.
Using δ-quasi-monotone and any almost increasing sequences we prove a theorem on summability factors of infinite series, which generalizes a theorem of Mazhar [7] on summability factors.