On inverse semigroup $C^*$-algebras and crossed products

Details On inverse semigroup $C^*$-algebras and crossed products On inverse semigroup $C^*$-algebras and crossed products

2011-04-12

arxiv.org/abs/1104.2304v1

Mathematics

Operator Algebras

Scientific paper

We describe the $C^*$-algebra of an $E$-unitary or strongly 0-$E$-unitary inverse semigroup as the partial crossed product of a commutative $C^*$-algebra by the maximal group image of the inverse semigroup. We give a similar result for the $C^*$-algebra of the tight groupoid of an inverse semigroup. We also study conditions on a groupoid $C^*$-algebra to be Morita equivalent to a full crossed product of a commutative $C^*$-algebra with an inverse semigroup, generalizing results of Khoshkam and Skandalis for crossed products with groups.

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