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SUMMARY:On Hausdorff covers for non-Hausdorff groupoids - Julian Gonzales 
 (University of Glasgow)
DTSTART:20250717T133000Z
DTEND:20250717T135000Z
UID:TALK233113@talks.cam.ac.uk
DESCRIPTION:Non-Hausdorff &eacute\;tale groupoids arise naturally in many 
 contexts\, however\, key tools used in the study of their Hausdorff counte
 rparts are not always applicable. This talk looks at a Hausdorff cover int
 roduced by Timmermann\, and describes how it can be used to avoid certain 
 technical difficulties encountered in the study of non-Hausdorff &eacute\;
 tale groupoids and their C*-algebras.&nbsp\;In particular\, the Hausdorff 
 cover yields characterisations of amenability\, as well as triviality of t
 he singular ideal in certain cases. This is based on joint work with K. A.
  Brix\, J. B. Hume and X. Li.
LOCATION:External
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