5 citations · 8 across the 15 of their papers we have counts for
4 papers · 2 filters
Pointwise summability of Fourier-Laguerre series of integrable functions
Maciej Kubiak, Wlodzimierz Lenski, Bogdan Szal
We present an approximation version of the results of D. P. Gupta [ J. of Approx. Theory, 7 (1973), 226-238] A. N. S. Singroura [Proc. Japan Acad., 39 (4) (1963), 208-210] and G. S…
Pointwise approximation of functions by matrix operators of their Fourier series with - differences of the entries
Wlodzimierz Lenski, Bogdan Szal
We extend the results of Xh. Z. Krasniqi [Acta Comment. Univ. Tartu. Math. 17 (2013), 89-101] and the authors [Acta Comment. Univ. Tartu. Math. 13 (2009), 11-24]. to the case where…
On estimates of deviation of conjugate functions from matrix operators of their Fourier series by some expressions with -differences of the entries
Wlodzimierz Lenski, Bogdan Szal
We extend the results of the authors from [Abstract and Applied Analysis, Volume 2016, Article ID 9712878] to the case conjugate Fourier series.
Estimates of convolution operators of functions from
Wlodzimierz Lenski, Bogdan Szal
We generalize and slight improve the result of I. I. Sharapudinov [Mat. Zametki, 1996, Volume 59, Issue 2, 291--302]. Some applications to the de la Vallée Poussin operator will al…