Joint approximation of periodic functions and their derivatives by the Fourier and the Vallee Poussin sums in the metric of L

DOI10.1007/BF01059714zbMath0568.42007OpenAlexW2004668723MaRDI QIDQ5902781

N. N. Sorich

Publication date: 1985

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

Full work available at URL: https://doi.org/10.1007/bf01059714

zbMATH Keywords

simultaneous approximationfractional derivative

Mathematics Subject Classification ID

Simultaneous approximation (41A28) Summability and absolute summability of Fourier and trigonometric series (42A24)

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