The brauer semigroup of a groupoid and a symmetric imprimitivity theorem

Jonathan Henry Brown, Geoff Goehle

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


In this paper we define a monoid called the Brauer semigroup for a locally compact Hausdorff groupoid E whose elements consist of Morita equivalence classes of E-dynamical systems. This construction generalizes both the equivariant Brauer semigroup for transformation groups and the Brauer group for a groupoid. We show that groupoid equivalence induces an isomorphism of Brauer semigroups and that this isomorphism preserves the Morita equivalence classes of the respective crossed products, thus generalizing Raeburn's symmetric imprimitivity theorem.

Original languageEnglish (US)
Pages (from-to)1943-1972
Number of pages30
JournalTransactions of the American Mathematical Society
Issue number4
StatePublished - 2014

All Science Journal Classification (ASJC) codes

  • General Mathematics
  • Applied Mathematics


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