Pointwise strong and very strong approximation by Fourier series of integrable functions

Details Pointwise strong and very strong approximation by Fourier series of integrable functions Pointwise strong and very strong approximation by Fourier series of integrable functions

2012-04-05

arxiv.org/abs/1204.1281v2

Mathematics

Classical Analysis and ODEs

Scientific paper

We will present an estimation of the $H_{k_{0},k_{r}}^{q}f$ $\ $and $% H_{u}^{\lambda \varphi}f$ means as a approximation versions \ of \ the Totik type generalization$(\text{see \cite{11, 12}}) $ \ of the results of \ J. Marcinkiewicz and A. Zygmund in \cite{JM, ZA}. As a measure of such approximations we will use the function constructed on the base of definition of the Gabisonia points \cite{1}. Some results on the norm approximation will also given.

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