Weak Notions of Normality and Vanishing up to Rank in L2-Cohomology
Weak Notions of Normality and Vanishing up to Rank in L2-Cohomology
复制标题
DOI:
10.1093/imrn/rnt029
复制
发表时间:
2012-06
影响因子:
1
通讯作者:
U. Bader;A. Furman;Roman Sauer
中科院分区:
文献类型:
--
作者:
U. Bader;A. Furman;Roman Sauer
We study vanishing results for L 2 -cohomology of countable groups under the presence of subgroups that satisfy some weak normality condition. As a consequence we show that the L 2 -Betti numbers of SLn(R) for any infinite integral domain R vanish below degree n 1. Another application is the vanishing of all L2-Betti numbers for Thompson's groups F and T.