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math.OA2000
An application of the DR-duality theory for compact groups to endomorphism categories of C*-algebras with nontrivial center
Hellmut Baumgaertel, Fernando Lledo
In Rev. Math. Phys. 4 (1997) 785 we study Hilbert-C* systems {F,G} where the fixed point algebra A has nontrivial center Z and where A'\cap F=Z is satisfied. The corresponding cate…
math.OA2000
Dual group actions on C*-algebras and their description by Hilbert extensions
H. Baumgaertel, F. Lledo
Given a C*-algebra , a discrete abelian group and a homomorphism Out defining the dual action group aut, the paper contains results on existence a…