On $L_{1}$-Convergence\\ of the $r$-th Derivative of Cosine Series\\ with $r$-quasi convex coefficients

Authors

  • N.L. Braha
  • Xh. Z. Krasniqi

DOI:

https://doi.org/10.1285/i15900932v30n2p113

Keywords:

cosine sums, L1-convergence, r-quasi convex null sequences

Abstract

We study $L_{1}$-convergence of $r-th$ derivative of modified cosine sums introduced in \cite{BN}. Exactly it is proved the  $L_{1}$- convergence of $r-th$ derivative of  modified  cosine   sums with $r$-quasi convex coefficients.

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Published

16-10-2011

Issue

Volume 30, Issue 2 (2010)

Section

Articoli

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