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On exact values of quasiwidths of some classes of functions

In the Hilbert space L 2(Δ2), Δ = [0, 2 π] we establish exact estimates of the Kolmogorov quasiwidths of some classes of periodic functions of two variables whose averaged modules of smoothness of mixed derivatives are majorizable by given functions.

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Bibliographic Details
Date:	1996
Main Authors:	Vakarchuk, S. B., Shabozov, M. Sh., Вакарчук, С. Б., Шабозов, М. Ш.
Format:	Article
Language:	Russian English
Published:	Institute of Mathematics, NAS of Ukraine 1996
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/5327
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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