Unique Cartan decomposition for II1 factors arising from arbitrary actions of hyperbolic groups

被引:67
|
作者
Popa, Sorin [1 ]
Vaes, Stefaan [2 ]
机构
[1] Univ Calif Los Angeles, Dept Math, Los Angeles, CA 90095 USA
[2] Katholieke Univ Leuven, Dept Math, B-3001 Louvain, Belgium
来源
JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK | 2014年 / 694卷
基金
比利时弗兰德研究基金会;
关键词
ERGODIC EQUIVALENCE RELATIONS; COHOMOLOGY; RIGIDITY; INDEX;
D O I
10.1515/crelle-2012-0104
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We prove that for any free ergodic probability measure preserving action Gamma curved right arrow (X, mu) of a non-elementary hyperbolic group, or a lattice in a rank one simple Lie group, the associated group measure space II1 factor L-infinity(X) (sic) Gamma has L-infinity(X) as its unique Cartan subalgebra, up to unitary conjugacy.
引用
收藏
页码:215 / 239
页数:25
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