INTEGRABILITY AND L1-CONVERGENCE OF CERTAIN COSINE SUMS WITH THIRD QUASI HYPER CONVEX COEFFICIENTS

INTEGRABILITY AND L1-CONVERGENCE OF CERTAIN COSINE SUMS WITH THIRD QUASI HYPER CONVEX COEFFICIENTS

In this paper criterion for L- convergence of a certain cosine sums with third quasi hyper-convex coefficients is obtained.

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