Generalized fixed point algebras for coactions of locally compact quantum groups

We extend the construction of generalized fixed point algebras to the setting of locally compact quantum groups – in the sense of Kustermans and Vaes – following the treatment of Marc Rieffel, Ruy Exel and Ralf Meyer in the group case. We mainly follow Meyer’s approach analyzing the constructions in...

Verfasser: Buss, Alcides
Dokumenttypen:Artikel
Erscheinungsdatum:2013
Publikation in MIAMI:05.05.2014
Datum der letzten Änderung:27.07.2015
Quelle:Münster Journal of Mathematics, 6 (2013), S. 295-341
Angaben zur Ausgabe:[Electronic ed.]
Fachgebiet (DDC):510: Mathematik
Lizenz:InC 1.0
Sprache:English
Format:PDF-Dokument
URN:urn:nbn:de:hbz:6-55309458340
Permalink:https://nbn-resolving.de/urn:nbn:de:hbz:6-55309458340
Onlinezugriff:MJM_2013_6_295-341.pdf
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520 3 |a We extend the construction of generalized fixed point algebras to the setting of locally compact quantum groups – in the sense of Kustermans and Vaes – following the treatment of Marc Rieffel, Ruy Exel and Ralf Meyer in the group case. We mainly follow Meyer’s approach analyzing the constructions in the realm of equivariant Hilbert modules. <br>We generalize the notion of continuous square-integrability, which is exactly what one needs in order to define generalized fixed point algebras. As in the group case, we prove that there is a correspondence between continuously square-integrable Hilbert modules over an equivariant <span style="font-style: italic;">C*</span>-algebra <span style="font-style: italic;">B </span>and Hilbert modules over the reduced crossed product of <span style="font-style: italic;">B </span>by the underlying quantum group. The generalized fixed point algebra always appears as the algebra of compact operators of the associated Hilbert module over the reduced crossed product. 
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