科研之友
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摘要
Given a quasi-special endomorphism rho of a C*-algebra A with nontrivial center, we study an extension problem for automorphisms of A to a minimal cross-product 5 of A by rho. Exploiting some aspects of the underlying generalized Doplicher-Roberts duality theory based on Pimsner algebras, an obstruction to the existence of such extensions is found and described in terms of sections of a suitable group bundle.
- 出版日期2010
