A note on the degree of approximation of a periodic function f by almost triangular matrix means. (English) Zbl 0713.42001
The authors establish a theorem to find out the degree of approximation of a class of functions belonging to the Lipschitz class \(\alpha (\alpha >0)\) by means of almost triangular matrix means.
MSC:
42A10 | Trigonometric approximation |
42A24 | Summability and absolute summability of Fourier and trigonometric series |