Compact C*-quantum groupoids

Abstract

We propose a definition of compact quantum groupoids in the setting of C*-algebras, associate to such a quantum groupoid a regular C*-pseudo-multiplicative unitary, and use this unitary to construct a dual Hopf C*-bimodule and to pass to a measurable quantum groupoid in the sense of Enock and Lesieur. Moreover, we discuss examples related to compact and to étale groupoids and study principal compact C*-quantum groupoids.

36 pages; missing references added

References in corpus (2)

• C*-pseudo-multiplicative unitaries
• $C^{\ast }$-pseudo-Kac systems and duality for coactions of concrete Hopf $C^{\ast }$-bimodules

Cited by in corpus (1)

• C*-pseudo-multiplicative unitaries and Hopf C*-bimodules