Turkish Journal of Mathematics
Abstract
Let $f$ be a continuous function which is periodic with respect to the hexagon lattice, and let $A$ be a lower triangular infinite matrix of nonnegative real numbers with nonincreasing rows. The degree of approximation of the function $f$ by matrix means $T_{n}^{\left( A\right) }\left( f\right) $ of its hexagonal Fourier series is estimated in terms of the modulus of continuity of $f.$
DOI
10.3906/mat-2002-76
Keywords
Hexagonal domain, hexagonal Fourier series, Hölder class, matrix mean
First Page
970
Last Page
985
Recommended Citation
GÜVEN, A (2020). Degree of approximation by means of hexagonal Fourier series. Turkish Journal of Mathematics 44 (3): 970-985. https://doi.org/10.3906/mat-2002-76
