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Approximation of classes of periodic multivariable functions by linear positive operators

In an N-dimensional space, we consider the approximation of classes of translation-invariant periodic functions by a linear operator whose kernel is the product of two kernels one of which is positive. We establish that the least upper bound of this approximation does not exceed the sum of properly...

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Bibliographic Details
Date:	2006
Main Authors:	Bushev, D. M., Kharkevych, Yu. I., Бушев, Д. М., Харкевич, Ю. І.
Format:	Article
Language:	Ukrainian English
Published:	Institute of Mathematics, NAS of Ukraine 2006
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/3430
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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