Outer actions of finite groups on prime C*-algebras
Abstract
An action of a compact, in particular finite group on a C*-algebra is called properly outer if no automorphism of the group that is distinct from identity is implemented by a unitary element of the algebra of local multipliers of the C*-algebra and strictly outer if the commutant of the algebra in the algebra of local mutipliers of the cross product consists of scalars [11]. In [11, Theorem 11] I proved that for finite groups and prime C*-algebras (not necessarily separable), the two notions are equivalent. I also proved that for finite abelian groups this is equivalent to other relevant properties of the action [11 Theorem 14]. In this paper I add other properties to the list in [11, Theorem 14].
- Publication:
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arXiv e-prints
- Pub Date:
- August 2024
- DOI:
- 10.48550/arXiv.2408.02510
- arXiv:
- arXiv:2408.02510
- Bibcode:
- 2024arXiv240802510P
- Keywords:
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- Mathematics - Operator Algebras
- E-Print:
- 9 pages