Abstract
Abstract Concerning the đż1-convergence of modified cosine sums introduced by Kumari and Ram [Indian J. Pure Appl. Math. 19: 1101â1104, 1988], we generalise the results of Kumari, Ram [Indian J. Pure Appl. Math. 19: 1101â1104, 1988] and Bor [Proc. Indian Acad. Sci. Math. Sci. 102: 235â238, 1992]. Also a necessary and sufficient condition for the đż1-convergence of cosine series has been deduced as a corollary for the said class.
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