A Koopman-von Neumann type theorem on the convergence of Cesàro means in Riesz spaces

Abstract

We extend the Koopman-von Neumann convergence condition on the Cesàro mean to the context of a Dedekind complete Riesz space with weak order unit. As a consequence, a characterisation of conditional weak mixing is given in the Riesz space setting. The results are applied to convergence in L 1 L^1 .