5 papers
On characterizations of amenable C*-dynamical systems and new examples
Narutaka Ozawa, Yuhei Suzuki
We show the equivalence of several amenability type conditions for C*-dynamical systems. As an application, based on the Pimsner--Meyer construction, we give a new method to produc…
On pathological properties of fixed point algebras in Kirchberg algebras
Yuhei Suzuki
We investigate how the fixed point algebra of a C*-dynamical system can differ from the underlying C*-algebra. For any exact group and any infinite group , we construct an o…
The approximation property and exactness of locally compact groups
Yuhei Suzuki
We extend a theorem of Haagerup and Kraus in the C*-algebra context: for a locally compact group with the approximation property (AP), the reduced C*-crossed product construction p…
Rigid sides of approximately finite dimensional simple operator algebras in non-separable category
Yuhei Suzuki
Applying Popa's orthogonality method to a new class of groups, we construct amenable group factors which are prime and have no infinite dimensional regular abelian *-subalgebras. B…
Complete descriptions of intermediate operator algebras by intermediate extensions of dynamical systems
Yuhei Suzuki
Practically and intrinsically, inclusions of operator algebras are of fundamental interest. The subject of this paper is intermediate operator algebras of inclusions. There are two…