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Compact operators and algebraic K-theory for groups which act properly and isometrically on Hilbert space

  • Guillermo Cortiñas EMAIL logo and Gisela Tartaglia
Published/Copyright: May 27, 2015

Abstract

We prove the K-theoretic Farrell–Jones conjecture for groups with the Haagerup approximation property and coefficient rings and C*-algebras which are stable with respect to compact operators. We use this and Higson–Kasparov’s result that the Baum–Connes conjecture holds for such a group G, to show that the algebraic and the C*-crossed product of G with a stable separable G-C*-algebra have the same K-theory.

Award Identifier / Grant number: UBACyT 20020100100386

Funding statement: The first author was partially supported by grant MTM2012-36917-C03-02 from Gobierno de España. Both authors were supported by CONICET, and partially supported by grant UBACyT 20020100100386 from Universidad de Buenos Aires and by grant PIP 11220110100800 from CONICET.

Acknowledgements

We wish to thank our colleague Gabriel Acosta for useful discussions, and Arthur Bartels and the anonymous referee for pointing out mistakes in previous versions of this paper. Part of the research for this article was carried out while the first named author was visiting Sasha Gorokhovsky at the University of Colorado Boulder. He is thankful to UCB and his host for their hospitality and to the latter for useful discussions.

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Received: 2014-5-12
Revised: 2014-12-13
Published Online: 2015-5-27
Published in Print: 2018-1-1

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