Demonstratio Mathematica (Nov 2018)

Pointwise approximation of 2 π/r-periodic functions by matrix operators of their Fourier series with r-differences of the entries

  • Łenski Włodzimierz,
  • Szal Bogdan

DOI
https://doi.org/10.1515/dema-2018-0024
Journal volume & issue
Vol. 51, no. 1
pp. 309 – 322

Abstract

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We extend the results of Xh. Z. Krasniqi [Acta Comment. Univ. Tartu. Math., 2013, 17, 89-101] and the authors [Acta Comment. Univ. Tartu. Math., 2009, 13, 11-24] to the case of 2 π/r-periodic functions. Moreover, as a measure of approximation r-differences of the entries are used.

Keywords