Some Aspects of Theory and Applications of Summability and its Developments

Abstract

If newlinef newlineis a newline2and#61552; and#61485; Periodic function of the class newlineLipand#61480;and#61537;,rand#61481; newline, then newlinedegree of approximation by the product newlineand#61480; and#61481;and#61480; and#61481; E q N pn newline, , newlinesummability newlinemeans on its Fourier series is given by newlineand#61480; and#61481; newline,0 1, 1 newline1 newline1 newline1 newlineand#61500; and#61500; and#61619; newlineand#61687; newlineand#61687; newlineand#61687; newlineand#61688; newlineand#61686; newlineand#61671; newlineand#61671; newlineand#61671; newlineand#61672; newlineand#61670; newlineand#61483; newlineand#61485; and#61501; newlineand#61483; newlineand#61605; newliner newlinen newlinef O newliner newlineand#61556; n and#61537; newlineand#61537; newline, newlinewhere newlinen newlineand#61556; newlineis the newlineand#61480;E,rand#61481;and#61480;N, p,qand#61481; newlinemean of the series. newline

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