Integrability and L 1-convergence of double cosine trigonometric series
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We study here L 1-convergence of new modified double cosine trigonometric sum and obtain a new necessary and sufficient condition for L 1-convergence of double cosine trigonometric series. Also, the results obtained by Moricz, are particular cases of ours.
Key wordsL1-convergence conjugate Dirichlet kernel
AMS (2010) subject classification42A20 42A32
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