ON L1 -CONVERGENCE OF NEWLY DEFINED MODIFIED SUM

Sakshi* and Karanvir Singh

Abstract

Many generalized and revised versions of the classes aforementioned have been introduced to study this problem of trigonometric series but assumptions on coefficients alone could not ensure the L1-convergence of either cosine series or sine series and the condition remained confirmed. In order to have better results, Rees and Stanojevic , Kumari and Ram and many other authors start defining cosine sums suitably for studying L1-convergence, as these sums give better results than conventional partial sums.So,motivated by the above authors we try to define the new modified sum. In order to prove this modified sum , we introduce a new class named as AW.

Keywords:

: New Modified Sum, AW Class, Convergence, L1-Metric


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References


[1] A. N. KOLMOGOROV, Sur Iā€™ordre de grandeur des coefficients de la series de Fourier-Lebesgue. Bull. Acad. Pol. Sci. Ser. Sri. Math AsIron. Phys. (1923), 83-86. [2] C. N. MOORE, On the use of Cesaro means in determining criteria for Fourier constants, Sot. Amer. Advan. SC., June 21, 1933. [3] C. S. REES AND C. V. STANOJEVIC, Necessary and sufficient conditions for integrability of certain cosine sums,J. Math. Anal. Appl. 43 (1973), 579-586. [4] J. W. GARRETT AND C. V. STANOJEVIC, On integrability and L1-convergence of certain cosine sums, Nofices Amer. Math. Sot. 22 (1975), A-166. [5] J. W. GARRETT AND c. V. STANOJEVIC, Necessary and sufficient conditions for L-convergence of trigonometric series, Proc. Amer. Math. Sot. 60 (1976), 68-71. [6] L. S. BOSANQUET, Note on convergence and summability factors (III), Proc. London Math. Sot. (1949), 482496. [7] NIRANJAN Singh AND K. M. SHARMA ,$L^1$-Convergence of Modified Cosine Sums with Generalized Quasiconvex Coefficients ,Journal Of Mathematical Analysis And Applications(1988) 136, 189-200

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