Crossed products by $C_0(X)$-actions

Details Crossed products by $C_0(X)$-actions Crossed products by $C_0(X)$-actions

1997-06-17

arxiv.org/abs/funct-an/9706003v1

Mathematics

Operator Algebras

41 pages AMS-LaTeX -- sequel to funct-an/9706002

Scientific paper

Suppose that $G$ has a representation group $H$, that $G_{ab}:= G/\bar{[G,G]}$ is compactly generated, and that $A$ is a \cs-algebra for which the complete regularization of $\Prim(A)$ is a locally compact Hausdorff space $X$. In a previous article, we showed that there is a bijection $\alpha \mapsto (Z_\alpha,f_\alpha)$ between the collection of exterior equivalence classes of locally inner actions $\alpha:G\to\Aut(A)$, and the collection of principal $\hgab$-bundles $Z_\alpha$ together with continuous functions $f_\alpha:X\to H^2(G,\T)$. In this paper, we compute the crossed products $A\rtimes_\alpha G$ in terms of the data $Z_\alpha$, $f_\alpha$, and~$\cs(H)$.

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