37 research outputs found
Equivalence bundles over a finite group and strong Morita equivalence for unital inclusions of unital -algebras
summary:Let and be -algebraic bundles over a finite group . Let and . Also, let and , where is the unit element in . We suppose that and are unital and and have the unit elements in and , respectively. In this paper, we show that if there is an equivalence -bundle over with some properties, then the unital inclusions of unital -algebras and induced by and are strongly Morita equivalent. Also, we suppose that and are saturated and that . We show that if and are strongly Morita equivalent, then there are an automorphism of and an equivalence bundle \hbox {}-bundle over with the above properties, where is the -algebraic bundle induced by and , which is defined by . Furthermore, we give an application.\looseness -
The Rohlin property for inclusions of -algebras with a finite Watatani index
We introduce notions of the Rohlin property and the approximate
representability for inclusions of unital -algebras. We investigate a dual
relation between the Rohlin property and the approximate representability. We
prove that a number of classes of unital -algebras are closed under
inclusions with the Rohlin property, including:
AF algebras, AI algebras, AT algebras, and related classes characterized by
direct limit decomposition using semiprojective building blocks. -algebras
with stable rank one. -algebras with real rank zero.Comment: We revised the section 4 and its correspondent part in Introduction
in the original pape