Learning Functions of Few Arbitrary Linear Parameters in High Dimensions

Massimo Fornasier, Karin Schnass, Jan Vybiral

Let us assume that $f$ is a continuous function defined on the unit ball of ${\mathbb{R}}^d$, of the form $f(x)=g(Ax)$, where $A$ is a $k\times d$ matrix and $g$ is a function of…