Title of article :
APPROXIMATION OF PERIODIC FUNCTIONS BY SUB-MATRIX MEANS OF THEIR FOURIER SERIES
Author/Authors :
KRASNIQI, XHEVAT Z University of Prishtina ”Hasan Prishtina” - Faculty of Education - Department of Mathematics and Informatics - Avenue ”Mother Theresa, Kosovo
Abstract :
Some results on approximation of periodic functions are extended in two
directions: Improving the degree of approximation of periodic functions by sub-matrix
means of its Fourier series and such degree is applicable for a wider class of summbility
matrices in the sense of their entries in which class of sequences belongs to.
Keywords :
Fourier series , degree of approximation , periodic functions , non-decreasing sequences , Ces`aro submethod
Journal title :
Turkish World Mathematical Society Journal of Applied and Engineering Mathematics
