Finite-Dimensionality of Z-Boundaries

Abstract

In this paper, we refine the notion of Z-boundaries of groups introduced by Bestvina and further developed by Dranishnikov. We then show that the standard assumption of finite-dimensionality can be omitted as the result follows from the other assumptions.

More concise version. For interested readers, a more detailed exposition can be found in the first version. To appear in Groups, Geometry, and Dynamics. 6 pages