An inverse theorem of approximation theory of periodic functions in various metrics

DOI10.1007/BF01236774zbMath0780.42002OpenAlexW2063200254MaRDI QIDQ1206258

N. A. Il'yasov

Publication date: 1 April 1993

Published in: Mathematical Notes (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf01236774

zbMATH Keywords

modulus of continuitymodulus of smoothnessFourier coefficientbest trigonometric approximationSteckin

Mathematics Subject Classification ID

Trigonometric approximation (42A10) Fourier coefficients, Fourier series of functions with special properties, special Fourier series (42A16)

Cites Work

• IMBEDDING THEOREMS AND INEQUALITIES IN VARIOUS METRICS FOR BEST APPROXIMATIONS
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