Schur Multipliers of $C^{\ast }$-algebras, group-invariant compactification and applications to amenability and percolation

Chiranjib Mukherjee, Konstantin Recke

Let $\Gamma$ be a countable discrete group. Given any sequence $(f_n{)}_{n\ge 1}$ of ${\ell }^p$-normalized functions ($p\in [1,2)$), consider the associated positive definite matrix coeffi…