L1-Convergence of r-th Differential of Trigonometric Series
Nawneet Hooda *
Department of Mathematics, DCR University of Sci. & Tech., Murthal-131039, India.
*Author to whom correspondence should be addressed.
Abstract
We obtain a necessary and sufficient condition for L1-convergence of r-th differential of trigonometric cosine series with monotonic decreasing coefficients.
Keywords: L1-convergence, r-th differential of trigonometric series