Amenable minimal Cantor systems of free groups arising from diagonal actions
Abstract
We study amenable minimal Cantor systems of free groups arising from the diagonal actions of the boundary actions and certain Cantor systems. It is shown that every virtually free group admits continuously many amenable minimal Cantor systems whose crossed products are mutually non-isomorphic Kirchberg algebras in the UCT class (with explicitly determined K-theory). The technique developed in our study also enables us to compute the K-theory of certain amenable minimal Cantor systems. We apply it to the diagonal actions of the boundary actions and the products of the odometer transformations, and determine their K-theory. Then we classify them in terms of the topological full groups, continuous orbit equivalence, strong orbit equivalence, and the crossed products.
Keywords
Cite
@article{arxiv.1312.7098,
title = {Amenable minimal Cantor systems of free groups arising from diagonal actions},
author = {Yuhei Suzuki},
journal= {arXiv preprint arXiv:1312.7098},
year = {2017}
}
Comments
31 pages; Some proofs are simplified and shortened. Remark added (Remark 4.9). Section 6 is deleted. To appear in J. Reine Angew. Math