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GROUP ACTION PRESERVING THE HAAGERUP PROPERTY OF $C^{\ast }$-ALGEBRAS

Part of: Selfadjoint operator algebras Normed linear spaces and Banach spaces; Banach lattices

Published online by Cambridge University Press:  11 August 2015

CHAO YOU
CHAO YOU*
Affiliation:
Center for Mathematics and Interdisciplinary Sciences, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150001, Heilongjiang, PR China Research Center for Operator Algebras, Department of Mathematics, East China Normal University, Shanghai 200062, PR China email youchao@hit.edu.cn
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Abstract

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From the viewpoint of $C^{\ast }$-dynamical systems, we define a weak version of the Haagerup property for the group action on a $C^{\ast }$-algebra. We prove that this group action preserves the Haagerup property of $C^{\ast }$-algebras in the sense of Dong [‘Haagerup property for $C^{\ast }$-algebras’, J. Math. Anal. Appl.377 (2011), 631–644], that is, the reduced crossed product $C^{\ast }$-algebra $A\rtimes _{{\it\alpha},\text{r}}{\rm\Gamma}$ has the Haagerup property with respect to the induced faithful tracial state $\widetilde{{\it\tau}}$ if $A$ has the Haagerup property with respect to ${\it\tau}$.

Keywords

group actionC∗ -algebracrossed productHaagerup property

MSC classification

Primary: 46L55: Noncommutative dynamical systems
Secondary: 46C05: Hilbert and pre-Hilbert spaces

Information

Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 93 , Issue 2 , April 2016 , pp. 295 - 300
Copyright
© 2015 Australian Mathematical Publishing Association Inc. 

References

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