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JOURNALS // Zapiski Nauchnykh Seminarov POMI // Archive

Zap. Nauchn. Sem. POMI, 2012 Volume 404, Pages 135–156 (Mi znsl5264)

This article is cited in 4 papers

Inequalities of type generalized Jackson theorem for best approximations

V. V. Zhuk

Saint-Petersburg State University, Saint-Petersburg, Russia

Abstract: Very simple methods to get upper estimates of type generalized Jackson theorem for best approximations of periodic function are proposed. These results are similar to generalized Jackson theorem which gives estimates in terms of moduli of continuity.

Key words and phrases: best approximation, continuity moduli, generalized Jackson theorem.

UDC: 517.5

Received: 05.10.2012


 English version:
Journal of Mathematical Sciences (New York), 2013, 193:1, 75–88

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