English

Strongly outer product type actions

Operator Algebras 2014-09-02 v3

Abstract

We show that for any countable discrete maximally almost periodic group GG and any UHF algebra AA, there exists a strongly outer product type action α\alpha of GG on AA. We also show the existence of countable discrete almost abelian group actions with a certain Rokhlin property on the universal UHF algebra. Consequently we get many examples of unital separable simple nuclear CC^*-algebras with tracial rank zero and a unique tracial state appearing as crossed products.

Keywords

Cite

@article{arxiv.1403.5357,
  title  = {Strongly outer product type actions},
  author = {Michael Y. Sun},
  journal= {arXiv preprint arXiv:1403.5357},
  year   = {2014}
}

Comments

36 pages total. Exposition simplified: removed proofs of well-known operator algebra facts etc. Added section to emphasize the ideas of bumping up and cutting down used. Now 22 pages. Lengthy but routine proofs deferred to thesis, exposition simplified

R2 v1 2026-06-22T03:31:21.501Z