2018
DOI: 10.17776/csj.439832
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Approximation by Double Deferred Nörlund Means of Double Fourier Series for Lipschitz Functions

Abstract: In this paper, the concept of Double Deferred Nörlund means is defined and some important results are obtained. Particularly, we investigate the rate of uniform approximation by Double Deferred Nörlund means of the rectangular partial sums of the double Fourier series of a function   , f x y belong to 01 Lip    on the two dimensional region , xy     . We also obtain the rate of uniform approximation by Double Deferred Cesáro means. Özet. Bu çalışmada, Double Deferred Nörlund ortalaması kavramı tanım… Show more

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“…Because of the similarity with the proof of Theorem 3.6 we omit the proof of this theorem. which is the double deferred Cesàro mean of the sum s k, (f ; x, y) introduced implicitly in [13]. It was shown there, that (3.17) and (3.18) are conditions of regularity for D b,d a,c .…”
Section: Main Results 31 Approximation By Deferred Generalized De La ...mentioning
confidence: 97%
“…Because of the similarity with the proof of Theorem 3.6 we omit the proof of this theorem. which is the double deferred Cesàro mean of the sum s k, (f ; x, y) introduced implicitly in [13]. It was shown there, that (3.17) and (3.18) are conditions of regularity for D b,d a,c .…”
Section: Main Results 31 Approximation By Deferred Generalized De La ...mentioning
confidence: 97%