APPROXIMATION OF FUNCTION f(x, y) BELONGING TO GENERALIZED LIPSCHITZ CLASS BY (N, pm, qn) METHOD OF THE DOUBLE FOURIER SERIES.

Authors :: LAL, SHYAM
MISHRA, ABHISHEK
Source :: Bulletin of Mathematical Analysis & Applications. 2015, Vol. 7 Issue 2, p28-36. 9p.
Publication Year :: 2015
Abstract: In this paper, a new estimate for the degree of approximation of a function f(x; y) belonging to generalized Lipschitz class Lip(ξ1, ξ2) by (N, pm, qn) summability method of its double Fourier series has been determined. [ABSTRACT FROM AUTHOR]

Subjects :: *APPROXIMATION theory
*GENERALIZATION
*LIPSCHITZ spaces
*SET theory
*FOURIER series
*SUMMABILITY theory

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