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, ALİ
(2020)
"Degree of approximation by means of hexagonal Fourier series,"
Turkish Journal of Mathematics: Vol. 44:
No.
3, Article 25.
https://doi.org/10.3906/mat-2002-76
Available at:
https://journals.tubitak.gov.tr/math/vol44/iss3/25
