A generalization of topological Rokhlin dimension and an embedding result

Abstract

We generalize Gabor's notion of topological Rokhlin dimension of $\mathbb{Z}^k$-actions on compact metric space to a class of general discrete countable amenable group actions which involves the approximate subgroup structure. Then with this generalization, we conclude the finiteness of topological Rokhlin dimension, amenability dimension, dynamic asymptotic dimension and also of the nuclear dimension of the crossed product. An embedding result is also obtained, regarding those systems with mean dimension less that $m/2$ and with a finite-dimensional free factor.