Almost-additive ergodic theorems for amenable groups
Abstract
In this paper we prove a general convergence theorem for almost-additive set functions on unimodular, amenable groups. These mappings take their values in some Banach space. By extending the theory of epsilon-quasi tiling techniques, we set the ground for far-reaching applications in the theory of group dynamics. In particular, we verify the almost-everywhere convergence of abstract approximable bounded, additive processes, as well as a Banach space approximation result for the spectral distribution function (integrated density of states) for random operators on discrete structures in a metric space. Further, we include a Banach space valued version of the Lindenstrauss ergodic theorem for amenable groups.
Keywords
Cite
@article{arxiv.1211.2089,
title = {Almost-additive ergodic theorems for amenable groups},
author = {Felix Pogorzelski},
journal= {arXiv preprint arXiv:1211.2089},
year = {2017}
}
Comments
Corrected version: Proposition 7.10 of the previous version removed, the assumption of approximability added in the pointwise ergodic theorem for bounded, additive processes (Theorem 7.12 in the new, Theorem 7.11 in the old version). Minor corrections and reference updates added as well