由双曲群任意作用产生的II_1因子的唯一Cartan分解
算子代数
2014-09-15 v3 动力系统
群论
摘要
我们证明,对于非初等双曲群或秩一单李群中格点的任意自由遍历保测度作用,相应的群测度空间II_1因子在酉共轭意义下具有唯一的Cartan子代数。
引用
@article{arxiv.1201.2824,
title = {Unique Cartan decomposition for II_1 factors arising from arbitrary actions of hyperbolic groups},
author = {Sorin Popa and Stefaan Vaes},
journal= {arXiv preprint arXiv:1201.2824},
year = {2014}
}
备注
v3: Considerably simplified proof of the main result. v2: Improved exposition; new result proving uniqueness of Cartan for crossed products by irreducible lattices in products of rank one Lie groups