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Estimates for the Variation of Functions Defined by Double Trigonometric Cosine Series

For functions of two variables defined by trigonometric cosine series with quasiconvex coefficients, we obtain estimates for their variations in the Hardy–Vitali sense.

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Bibliographic Details
Date:	2003
Main Authors:	Hembars'ka, S. B., Гембарская, С. В
Format:	Article
Language:	Russian English
Published:	Institute of Mathematics, NAS of Ukraine 2003
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/3949
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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