Besov regularity of random wavelet series
Studia Mathematica
MSC: Primary 42B35; Secondary 42C40, 60G17, 60G60, 60H50
DOI: 10.4064/sm241205-13-10
Published online: 29 October 2026
Abstract
We study the Besov regularity of wavelet series on $\mathbb R^d$ with randomly chosen coefficients. More precisely, each coefficient is a product of a random factor and a parameterized deterministic factor that decays (or grows) with the scale $j$ and the norm of the shift $m$. Compared to the literature, we impose relatively mild conditions on the moments of the random variables in order to characterize the almost sure convergence of the wavelet series in Besov spaces $B^s_{p,q}(\mathbb R^d)$ and the finiteness of the moments as well as of the moment generating function of the Besov norm. In most cases, we achieve a complete characterization, i.e., the conditions derived are both necessary and sufficient.
