一类超刚性群冯·诺伊曼代数
算子代数
2012-08-21 v3 群论
摘要
我们证明,对于相当大一类广义圈积群中的任意群G,其关联的冯·诺伊曼代数L(G)完全“记住”了群G。更精确地说,若L(G)同构于某个可数群Λ的冯·诺伊曼代数L(Λ),则Λ必然同构于G。这代表了关于群冯·诺伊曼代数的首个超刚性结果。
引用
@article{arxiv.1007.1412,
title = {A class of superrigid group von Neumann algebras},
author = {Adrian Ioana and Sorin Popa and Stefaan Vaes},
journal= {arXiv preprint arXiv:1007.1412},
year = {2012}
}
备注
v3: minor changes, final version, to appear in Annals of Mathematics. v2: improved and clarified exposition