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Exact Jackson - Stechkin-type inequalities for 2π -periodic functions in L 2 and widths of some classes of functions

We consider the problem of finding exact inequalities for the best approximations of periodical differentiable functions by trigonometric polynomials and the m -order moduli of continuity in the space L 2 and present their applications. For some classes of functions defined by the indicated moduli...

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Bibliographic Details
Date:	2011
Main Authors:	Shabozov, M. Sh., Шабозов, М. Ш.
Format:	Article
Language:	Russian English
Published:	Institute of Mathematics, NAS of Ukraine 2011
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/2816
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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