James Fletcher

activity

20172019

most citedGroupoid algebras as covariance algebras

2 citations · 2 across the 3 of their papers we have counts for

collaborators

5 papers

math.OA2019★ 2 cited

Groupoid algebras as covariance algebras

Lisa Orloff Clark, James Fletcher

Suppose $G$ is a second-countable locally compact Hausdorff étale groupoid, $G$ is a discrete group containing a unital subsemigroup $P$ , and $c : G \to G$ …

math.OA2019

All classifiable Kirchberg algebras are $C^{*}$ -algebras of ample groupoids

Lisa Orloff Clark, James Fletcher, Astrid an Huef

In this note we show that every Kirchberg algebra in the UCT class is the $C^{*}$ -algebra of a Hausdorff, ample, amenable and locally contracting groupoid. The non-unital case f…

math.RA2018

$Z$ -graded rings as Cuntz-Pimsner rings

Lisa Orloff Clark, James Fletcher, Roozbeh Hazrat +1

Given a $Z$ -graded ring $A$ and a subring $R \subseteq A$ , it is natural to ask whether $A$ can be realised as the Cuntz-Pimsner ring of some $R$ -system. In this paper, we…

math.OA2018

A program for finding all KMS states on the Toeplitz algebra of a higher-rank graph

James Fletcher, Astrid an Huef, Iain Raeburn

The Toeplitz algebra of a finite graph of rank $k$ carries a natural action of the torus $T^{k}$ , and composing with an embedding of $R$ in $T^{k}$ gives…

math.OA2017

A uniqueness theorem for the Nica-Toeplitz algebra of a compactly aligned product system