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Tracial approximate divisibility and stable rank one

Xuanlong Fu 符玄龙  (University of Toronto)

10:00-11:00, November 22, 2021   Tencent Meeting：688 6335 2402

Abstract:

In 2004, M. Rordam showed that every unital simple finite $\mathcal{Z}$-stable C*-algebra has stable rank one. The question that whether a non-unital simple finite $\mathcal{Z}$-stable C*-algebra has stable rank one or not is remained open since then.
Recently we show that every separable simple tracially approximately divisible C*-algebra has strict comparison, and, it is either purely infinite or has stable rank one.
As a consequence, we show that every (non-unital) simple finite $\mathcal{Z}$-stable C*-algebra has stable rank one. Hence the problem of dichotomy of finiteness and of stable rank for simple $\mathcal{Z}$-stable (not necessary unital) C*-algebras is settled. This is a joint work with Kang Li and Huaxin Lin.

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