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Values of the Pukánszky invariant in McDuff factors
- Source :
-
Journal of Functional Analysis . Feb2008, Vol. 254 Issue 3, p612-631. 20p. - Publication Year :
- 2008
-
Abstract
- Abstract: In 1960 Pukánszky introduced an invariant associating to every masa in a separable II1 factor a non-empty subset of . This invariant examines the multiplicity structure of the von Neumann algebra generated by the left-right action of the masa. In this paper it is shown that any non-empty subset of arises as the Pukánszky invariant of some masa in a separable McDuff II1 factor containing a masa with Pukánszky invariant . In particular the hyperfinite II1 factor and all separable McDuff II1 factors with a Cartan masa satisfy this hypothesis. In a general separable McDuff factor we show that every subset of containing ∞ is obtained as a Pukánszky invariant of some masa. [Copyright &y& Elsevier]
- Subjects :
- *VON Neumann algebras
*MATHEMATICAL analysis
*INVARIANTS (Mathematics)
*MATHEMATICS
Subjects
Details
- Language :
- English
- ISSN :
- 00221236
- Volume :
- 254
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Functional Analysis
- Publication Type :
- Academic Journal
- Accession number :
- 28059977
- Full Text :
- https://doi.org/10.1016/j.jfa.2007.10.011