Approximation property of $C^*$-algebraic Bundles

Details Approximation property of $C^*$-algebraic Bundles Approximation property of $C^*$-algebraic Bundles

1999-06-11

arxiv.org/abs/math/9906070v1

Mathematics

Operator Algebras

13 pages, Latex

Scientific paper

In this paper, we will define the reduced cross-sectional $C^*$-algebras of $C^*$-algebraic bundles over locally compact groups and show that if a $C^*$-algebraic bundle has the approximation property (defined similarly as in the discrete case), then the full cross-sectional $C^*$-algebra and the reduced one coincide. Moreover, if a semi-direct product bundle has the approximation property and the underlying $C^*$-algebra is nuclear, then the cross-sectional $C^*$-algebra is also nuclear. We will also compare the approximation property with the amenability of Anantharaman-Delaroche in the case of discrete groups.

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