On the approximation by trigonometric polynomials in weighted Lorentz spaces

We obtain estimates of structural characteristics of 2π-periodic functions by the best trigonometric approximations in weighted Lorentz spaces, and show that the order of generalized modulus of smoothness depends not only on the rate of the best approximation, but also on the metric of the spaces. I...

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Bibliographic Details
Main Authors: Vakhtang Kokilashvili, Yunus E. Yildirir
Format: Article
Language:English
Published: Wiley 2010-01-01
Series:Journal of Function Spaces and Applications
Online Access:http://dx.doi.org/10.1155/2010/372106
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