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

Authors

  • S. B. Hembars'ka

Abstract

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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Published

25.06.2003

Issue

Vol. 55 No. 6 (2003)

Section

Research articles

How to Cite

Hembars'ka, S. B. “Estimates for the Variation of Functions Defined by Double Trigonometric Cosine Series”. Ukrains’kyi Matematychnyi Zhurnal, vol. 55, no. 6, June 2003, pp. 733-49, https://umj.imath.kiev.ua/index.php/umj/article/view/3949.