We investigate the behavior of Fourier coefficients of Lip α class functions with respect to general orthonormal systems (ONS). The generalizations in a certain sense of some theorems by S. Szász, B. I. Golubov and S. V. Bochkarev are obtained.
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Cagareishvili, G., Gogoladze, L. General Fourier coefficients for Lip α class functions. Acta Math. Hungar. 161, 327–340 (2020). https://doi.org/10.1007/s10474-020-01019-4
Key words and phrases
- orthonormal system
- trigonometric system
- Haar system
- Rademacher system
- Fourier coefficient
- function class Lip α
Mathematics Subject Classification