2 papers
math.OA2019
A Groupoid Picture of Elek Algebras
Clemens Borys
We describe a construction by Gábor Elek, associating C*-algebras with uniformly recurrent subgroups, in the language of groupoid C*-algebras. This allows us to simplify several pr…
math.OA2019
The Furstenberg Boundary of a Groupoid
Clemens Borys
We define the Furstenberg boundary of a locally compact Hausdorff étale groupoid, generalising the Furstenberg boundary for discrete groups, by providing a construction of a groupo…