Erratum to “Pointwise Analog of the Stečkin Approximation Theorem”

by Włodzimierz Łenski
Published 2014-01-01

On Estimates of Deviation of Functions from Matrix Operators of Their Fourier Series by Some Expressions with r-Differences of the Entries

by Włodzimierz Łenski, Bogdan Szal
Published 2016-01-01

Pointwise Approximation of Functions from 𝐿𝑝(𝑤)𝛽 by Linear Operators of Their Fourier Series

by Włodzimierz Łenski, Bogdan Szal
Published 2012-01-01

Pointwise approximation of modified conjugate functions by matrix operators of conjugate Fourier series of 2π/r $2\pi /r$-periodic functions

by Mateusz Kubiak, Włodzimierz Łenski, Bogdan Szal
Published 2018-04-01