Gelfand numbers related to structured sparsity and Besov space embeddings with small mixed smoothness

Sjoerd Dirksen, Tino Ullrich

We consider the problem of determining the asymptotic order of the Gelfand numbers of mixed-(quasi-)norm embeddings ${\ell }_p^b({\ell }_q^d)\hookrightarrow {\ell }_r^b({\ell }_u^d)$ given th…