101 citations · 209 across the 33 of their papers we have counts for
23 papers · 1 filter
Generalised Twisted Groupoids and their C*-algebras
Lisa Orloff Clark, Michael Ó Ceallaigh, Hung Pham
We consider a locally compact Hausdorff groupoid , and twist by a more general locally compact Hausdorff abelian group rather than the complex unit circle . We i…
Cartan semigroups and twisted groupoid C*-algebras
Tristan Bice, Lisa Orloff Clark, Ying-Fen Lin +1
We prove that twisted groupoid C*-algebras are characterised, up to isomorphism, by having Cartan semigroups, a natural generalisation of normaliser semigroups of Cartan subalgebra…
Representing topological full groups in Steinberg algebras and C*-algebras
Becky Armstrong, Lisa Orloff Clark, Mahya Ghandehari +2
We study the natural representation of the topological full group of an ample Hausdorff groupoid in the groupoid's complex Steinberg algebra and in its full and reduced C*-algebras…
The local bisection hypothesis for twisted groupoid C*-algebras
Becky Armstrong, Jonathan H. Brown, Lisa Orloff Clark +4
In this note, we present criteria that are equivalent to a locally compact Hausdorff groupoid being effective. One of these conditions is that satisfies the "C*-algebraic l…
A Steinberg algebra approach to étale groupoid C*-algebras
Lisa Orloff Clark, Joel Zimmerman
We construct the full and reduced C*-algebras of an ample groupoid from its complex Steinberg algebra. We also show that our construction gives the same C*-algebras as the standard…
Inclusions of C*-algebras of graded groupoids
Becky Armstrong, Lisa Orloff Clark, Astrid an Huef
We consider a locally compact Hausdorff groupoid which is graded over a discrete group. Then the fibre over the identity is an open and closed subgroupoid . We show that b…