Examples of subfactors with property T standard invariant

Authors
Citation
D. Bisch et S. Popa, Examples of subfactors with property T standard invariant, GEO FUNCT A, 9(2), 1999, pp. 215-225
Citations number
18
Categorie Soggetti
Mathematics
Journal title
GEOMETRIC AND FUNCTIONAL ANALYSIS
ISSN journal
1016443X → ACNP
Volume
9
Issue
2
Year of publication
1999
Pages
215 - 225
Database
ISI
SICI code
1016-443X(1999)9:2<215:EOSWPT>2.0.ZU;2-R
Abstract
Let H and K be two finite groups with a properly outer action on the II1 fa ctor M. We prove that the standard invariant of the group type inclusion M- H subset of M x K, studied in detail in [BiH], has property T in the sense of [Po6] if and only if the group generated by H and K in the outer automor phism group of M has Kazhdan's property T [K]. This construction yields irr educible, infinite depth subfactors with small Jones indices and property T standard invariant.