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Best approximations of the classes $B_{p,\,\theta}^{r}$ of periodic functions of many variables in uniform metric

We obtain estimates exact in order for the best approximations of the classes $B_{\infty,\,\theta}^{r}$ of periodic functions of two variables in the metric of $L_{\infty}$ by trigonometric polynomials whose spectrum belongs to a hyperbolic cross. We also investigate the best approximations of the c...

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Bibliographic Details
Date:	2006
Main Authors:	Romanyuk, A. S., Романюк, А. С.
Format:	Article
Language:	Russian English
Published:	Institute of Mathematics, NAS of Ukraine 2006
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/3541
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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