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Commutator Ideals and Semicommutator Ideals of Toeplitz Algebras Associated with Flows

Paul S. Muhly, Jingbo Xia
1992 Proceedings of the American Mathematical Society  
We prove that for a Toeplitz C* -algebra associated with a flow that has no fixed points, the commutator ideal and the semicommutator ideal coincide. However, the trouble with this possible index theory is that, except for the few
doi:10.2307/2159489 fatcat:7igopheh5jbadbs3ipjvhk6piu