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Simplicity Of Reduced Amalgamated Products of C*-Algebras

Published online by Cambridge University Press:  20 November 2018

Kevin McClanahan*
Affiliation:
Department of Mathematics, University of Mississippi University, Mississippi 38677 U.S.A.
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Abstract

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We give sufficient conditions for the simplicity of reduced amalgamated products of C*-algebras. We show that in some situations a minimal projection in a unital C*-algebra A is minimal in a free product A *-cB. We show that in certain situations if a minimal projection in A were minimal in a particular reduced free product of A and B then the reduced free product would be a simple C*-algebra which has finite and infinite projections.

Keywords

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1994

References

[Av] Avitzour, D., Free products of C* -algebras, Trans. Amer. Math. Soc. 271(1982), 423–465.Google Scholar
[Bll] Blackadar, B., K-theoryfor operator algebras, Springer-Verlag, New York, Berlin, Heidelberg, London, Paris, Tokyo, 1987.Google Scholar
[BI2] Blackadar, B., Comparison theory in simple C* -algebras. In: Operator algebras and applications Volume 1: Structure theory; AT-theory, geometry and topology, London Mathematical Society Lecture Notes Series 135, Cambridge University Press, Cambridge, New York, New Rochelle, Melbourne, Sydney, 1988, 21–54.Google Scholar
[Br] Brown, L., Ext of certain free product C* -algebras, J. Operator Theory 6(1981), 135–141.Google Scholar
[Ch1] Choi, M., A simple C* -algebra generated by two finite order unitaries, Canad. J. Math. 31(1979), 867–880.Google Scholar
[Ch2] Choi, M., The full C* -algebra of the free group on two generators, Pacific J. Math. 87(1980), 41–48.Google Scholar
[CI] Clarke, N. P., A finite but not stably finite C* -algebra, Proc. Amer. Math. Soc. 96(1986), 85–88.Google Scholar
[Co] Coburn, L., The C* -algebra generated by an isometry I, Bull. Amer. Math. Soc. 13(1967), 722-726.Google Scholar
[Coh] Cohen, J., C* -algebras without idempotents, J. Funct. Anal. 33(1979), 211–216.Google Scholar
[Con] Connes, A., Non-commutative differential topology, Inst. Hautes átudes Sci. Publ. Math. 62(1985), 257ߝ360.Google Scholar
[Cul] Cuntz, J., K-theoretic amenability for discrete groups, Crelles J. 344(1983), 181–195.Google Scholar
[Cu2] Cuntz, J., K-theoryfor certain C* -algebras, Ann. of Math. 113(1981), 181-197.Google Scholar
[Cu3] Cuntz, J., Simple C* -algebras generated by isometries, Comm. Math. Phys. 57(1977), 173–185.Google Scholar
[Cu4] Cuntz, J., The internal structure of simple C* -algebras, Proc. Symp. Pure Math. 38(1982), 85–115.Google Scholar
[Cu5] Cuntz, J., The K-groups for free products of C* -algebras. In: Proceedings of Symposia in Pure Mathematics, Vol. 38, Part 1, Amer. Math. Soc, Providence, Rhode Island, 1982, 81–84.Google Scholar
[EL] Exel, R. and Loring, T., Finite-dimensional representations of free product C\C* -algebras, preprint.Google Scholar
[L] Lance, E. C., K-theoryfor certain group C* -algebras, Acta Math. 151(1983), 209–230.Google Scholar
[McCl] McClanahan, K., C* -algebras generated by elements of a unitary matrix, J. Funct. Anal., to appear.Google Scholar
[McC2] McClanahan, K., K-theory and Ext-theory for rectangular unitary C* -algebras, Rocky Mountain J. Math, to appear.Google Scholar
[McC3] McClanahan, K., K-theoryfor certain reduced free products of C* -algebras, preprint.Google Scholar
[McC4] McClanahan, K., KK-groups of crossed products by grouplike sets acting on trees, preprint.Google Scholar
[PS] Paschke, W. L. and Salinas, N., C* -algebras associated with free products of groups, Pacific J. Math. 82(1979), 211–221.Google Scholar
[Ph] Phillips, N. C., Classifying algebras for the K-theory of σ-C-algebras, Canad. J. Math. 41(1989), 1021–1089.Google Scholar
[PV] Pimsner, M. and Voiculescu, D., K-groups of reduced crossed products by free groups, J. Operator Theory 8(1982), 131–156.Google Scholar
[Rf] Rieffel, M. A., Dimension and stable rank in the K-theory of C* -algebras, Proc. London Math. Soc. 46(1983), 301–333.Google Scholar
[Rø] Rørdam, M., On the structure of simple C* -algebras tensored with a UHF-algebra, J. Funct. Anal. 100(1991), 1–17.Google Scholar
[Sp] Spanier, E., Algebraic Topology, McGraw-Hill, New York, 1966.Google Scholar
[Voi] Voiculescu, D., Symmetries of some reduced free product C* -algebras, Operator Algebras and Their Connections with Topology and Ergodic Theory, Lecture Notes in Math. 1132, Springer, Berlin, New York, 1985, 556–588.Google Scholar