English

Existence of the Matui-Sato tracial Rokhlin property

Operator Algebras 2014-09-16 v4

Abstract

We show by construction that when GG is an elementary amenable group and AA is a unital simple nuclear and tracially approximately divisible CC^*-algebra, there exists an action ω\omega of GG on AA with the tracial Rokhlin property in the sense of Matui and Sato. In particular, group actions with this Matui-Sato tracial Rokhlin property always exist for unital simple separable nuclear CC^*-algebras with tracial rank at most one. If AA is simple with rational tracial rank at most one, then the crossed product AωGA\rtimes_{\omega}G is also simple with rational tracial rank at most one.

Keywords

Cite

@article{arxiv.1402.5560,
  title  = {Existence of the Matui-Sato tracial Rokhlin property},
  author = {Michael Yuan Sun},
  journal= {arXiv preprint arXiv:1402.5560},
  year   = {2014}
}

Comments

21 pages. Results for crossed products updated to reflect Osawa-Rordam-Sato's recent work. Exposition simplified and title changed. To appear in the Journal of Operator Theory