Estimates for the strong de la Vallée Poussin means in case of periodic continuous functions of two variables

zbMath0884.42008MaRDI QIDQ1370579

Krzysztof Nowakowski, Roman Taberski

Publication date: 26 October 1997

Published in: Functiones et Approximatio. Commentarii Mathematici (Search for Journal in Brave)

zbMATH Keywords

double Fourier seriesstrong de la Vallée-Poussin averages

Mathematics Subject Classification ID

Trigonometric approximation (42A10) Summability in several variables (42B08) Summability and absolute summability of Fourier and trigonometric series (42A24)

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