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 $L^p$ spaces of the span of powers of functions $\{{\psi }^{\lambda }:\lambda \in \Lambda \}$, $\Lambda \subset \mathbb{N}$ in the spirit of the Müntz-Szász Theorem…