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On classification of non-unital simple amenable C*-algebras, I (1611.04440v3)

Published 14 Nov 2016 in math.OA

Abstract: We present a stable uniqueness theorem for non-unital C*-algebras. Generalized tracial rank one is defined for stably projectionless simple C*-algebras. Let $A$ and $B$ be two stably projectionless separable simple amenable C*-algebras with $gTR(A)\le 1$and $gTR(B)\le 1.$ Suppose also that $KK(A, D)=KK(B,D)={0}$ for all C*-algebras $D.$ Then $A\cong B$ if and only if they have the same tracial cones with scales. We also show that every separable simple C*-algebra, $A$ with finite nuclear dimension which satisfies the UCT with non-zero traces must have $gTR(A)\le 1$ if $K_0(A)$ is torsion. In the next part of this research, we show similar results without the restriction on $K$-theory.

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