activity
20202026
collaborators

7 papers

math.OA2026

Single generation of transformation group algebras

George A. Elliott, Chun Guang Li, Zhuang Niu

We prove that is singly generated whenever is a finitely generated discrete amenable group and its action on the nonempty compact metrizable space is free, m…

math.OA2026

On the generators of separable unital C*-algebras

George A. Elliott, Chun Guang Li, Zhuang Niu

Let be a separable unital -algebra with nonempty tracial state space and strict comparison by ordinary tracial states. If embeds unitally into , th…

math.OA2026

On generators of

George A. Elliott, Chun Guang Li, Zhuang Niu

It is shown that the reduced group C*-algebra is singly generated, where is the free group on two generators. With respect to the gener…

math.OA2026

A simple separable C*-algebra which is not singly generated

George A. Elliott, Chun Guang Li, Zhuang Niu

It is shown that there is a simple unital separable AH algebra which is not singly generated.

math.OA2026

Strict comparison holds in the uniform Roe algebra of a discrete amenable group

George A. Elliott, Chun Guang Li, Zhuang Niu +1

Let be a countable discrete amenable group, and let . It is shown that if are positive elements such that $$\mathrm{d}_…

math.OA2022

Remarks on Villadsen algebras

George A. Elliott, Chun Guang Li, Zhuang Niu

It is shown that certain unital simple C*-algebras constructed by Villadsen are classified by the K0-group together with radius of comparison.

math.OA2020

Stable rank of

Chun Guang Li, Zhuang Niu

It is shown that, for an arbitrary free and minimal -action on a compact Hausdorff space , the crossed product C*-algebra always h…