Affiliation:
1. Dipartimento di Matematica, University of Rome "La Sapienza", P.le Aldo Moro, 2 — 00185 Roma, Italy
Abstract
We study C*-algebra endomorphims which are special in a weaker sense with respect to the notion introduced by Doplicher and Roberts. We assign to such endomorphisms a geometrical invariant, representing a cohomological obstruction for them to be special in the usual sense. Moreover, we construct the crossed product of a C*-algebra by the action of the dual of a (nonabelian, noncompact) group of vector bundle automorphisms. These crossed products supply a class of examples for such generalized special endomorphisms.
Publisher
World Scientific Pub Co Pte Lt
Cited by
4 articles.
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