On Intermediate Subalgebras of C*-simple Group Actions
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Abstract We show that for a large class of actions $\Gamma \curvearrowright \mathcal{A}$ of $C^*$-simple groups $\Gamma $ on unital $C^*$-algebras $\mathcal{A}$, including any non-faithful action of a hyperbolic group with trivial amenable radical, every intermediate $C^*$-subalgebra $\mathcal{B}$, $C_{\lambda }^*(\Gamma )\subseteq \mathcal{B} \subseteq \mathcal{A}\rtimes _{r}\Gamma $, is of the form $\mathcal{A}_1\rtimes _{r}\Gamma $, where $\mathcal{A}_1$ is a unital $\Gamma $-$C^*$-subalgebra of $\mathcal{A}$.
2019 ◽
Vol 12
(05)
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pp. 1950081
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2020 ◽
Vol 29
(04)
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pp. 2050021
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2009 ◽
Vol 12
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pp. 82-119
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2004 ◽
Vol 184
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pp. 119-160
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1995 ◽
Vol 51
(3)
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pp. 495-499
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2019 ◽
Vol 18
(04)
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pp. 1950070
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