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Degree of approximation of continuous functions. (English) Zbl 0719.42004

Summary: Generalising an earlier result due to the present author [Commun. Fac. Sci. Univ. Ankara, Sér. A 1 30, 7-16 (1981; Zbl 0449.42001)], it is shown as a particular case that the degree of approximation of functions \(f\in Lip \alpha\) \((0<\alpha \leq 1)\) by \((E,q)\)-means of its Fourier series in sup-norm is \(O\{n^{-\alpha}\log n\}\).

MSC:

42A10 Trigonometric approximation
41A25 Rate of convergence, degree of approximation

Citations:

Zbl 0449.42001