Certain aperiodic automorphisms of unital simple projectionless C*-algebras
| dc.creator | Sato, Yasuhiko | |
| dc.date | 2008-07-29 | |
| dc.date.accessioned | 2026-07-07T09:53:41Z | |
| dc.date.available | 2026-07-07T09:53:41Z | |
| dc.description | Let $G$ be an inductive limit of finite cyclic groups and let $A$ be a unital simple projectionless C*-algebra with $K_1(A) \cong G$ and with a unique tracial state, as constructed based on dimension drop algebras by Jiang and Su. First, we show that any two aperiodic elements in $\Aut(A)/\WInn(A)$ are conjugate, where $\WInn(A)$ means the subgroup of $\Aut(A)$ consisting of automorphisms which are inner in the tracial representation. In the second part of this paper, we consider a class of unital simple C*-algebras with a unique tracial state which contains the class of unital simple AT-algebras of real rank zero with a unique tracial state. This class is closed under inductive limits and under crossed products by actions of $\Z$ with the Rohlin property. Let $A$ be a TAF-algebra in this class. We show that for any automorphism $α$ of $A$ there exists an automorphism $\widetildeα$ of $A$ with the Rohlin property such that $\widetildeα$ and $α$ are asymptotically unitarily equivalent. In its proof we use an aperiodic automorphism of the Jiang-Su algebra. | |
| dc.description | 30 pages | |
| dc.identifier | https://arxiv.org/abs/0807.4761 | |
| dc.identifier | http://arxiv.org/abs/0807.4761 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/166040 | |
| dc.subject | Operator Algebras | |
| dc.subject | 46L40 | |
| dc.title | Certain aperiodic automorphisms of unital simple projectionless C*-algebras | |
| dc.type | text |