Hostname: page-component-8448b6f56d-c47g7 Total loading time: 0 Render date: 2024-04-24T13:52:35.624Z Has data issue: false hasContentIssue false

K-Homology of the Rotation Algebras Aθ

Published online by Cambridge University Press:  20 November 2018

Tom Hadfield*
Affiliation:
School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS, U.K. e-mail: t.hadfield@qmul.ac.uk
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We study the $\text{K}$-homology of the rotation algebras ${{A}_{\theta }}$ using the six-term cyclic sequence for the $\text{K}$-homology of a crossed product by $Z$. In the case that $\theta $ is irrational, we use Pimsner and Voiculescu's work on $\text{AF}$-embeddings of the ${{A}_{\theta }}$ to search for the missing generator of the even $\text{K}$-homology.

Keywords

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2004

References

[1] Baum, P., Connes, A. and Higson, N.. Classifying space for proper actions and K-theory of group C*-algebras. Contemp.Math. 167(1994), 241291.Google Scholar
[2] Blackadar, B., K-theory for operator algebras. Mathematical Sciences Research Institute Publications, 5, Cambridge University Press, Cambridge, 1998.Google Scholar
[3] Connes, A., Noncommutative geometry. Academic Press, San Diego, 1994.Google Scholar
[4] Davidson, K., C*-algebras by example. Fields InstituteMonographs, 6, Amer. Math. Soc., Providence, RI, 1996.Google Scholar
[5] Pimsner, M. and Voiculescu, D.-V., Exact sequences for K-groups and Ext groups of certain cross-product algebras. J. Operator Theory 4(1980), 93118.Google Scholar
[6] Pimsner, M. and Voiculescu, D.-V., Imbedding the irrational rotation algebras into an AF-algebra. J. Operator Theory 4(1980), 201220.Google Scholar
[7] Popa, S. and Rieffel, M.. The Ext groups of the C*-algebras associated with irrational rotations. J. Operator Theory 3(1980), 271274 .Google Scholar
[8] Rieffel, M., C*-algebras associated with irrational rotations. Pacific J. Math. 93(1981), 415429.Google Scholar
[9] Rieffel, M., Noncommutative tori—a case study of noncommutative differentiable manifolds. Contemp. Math 105(1990), 191211.Google Scholar
[10] Rosenberg, J. and Schochet, C., The Kunneth theorem and the universal coefficient theorem for Kasparov's generalised K-functor. Duke Math. J. 55(1987), 431474.Google Scholar
[11] Weibel, C., An introduction to homological algebra. Cambridge Studies in AdvancedMathematics, 38, Cambridge University Press, Cambridge, 1994.Google Scholar