2 papers
math.CA2017
Strong convergence of two--dimensional Vilenkin-Fourier series
N. Memiæ, I. Simon, G. Tephnadze
We prove that certain means of the quadratical partial sums of the two-dimensional Vilenkin-Fourier series are uniformly bounded operators from the Hardy space to the space…
math.CA2016
Density of the span of powers of a function à la Müntz-Szasz
Philippe Jaming, Ilona Simon
The aim of this paper is to establish density properties in spaces of the span of powers of functions , in the spirit of the Müntz-Szász Theorem…