Hyperlinearity, essentially free actions and L2-invariants. The sofic property
Hyperlinearity, essentially free actions and L2-invariants. The sofic property
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超线性,本质上是自由动作和 L2 不变量。
DOI:
10.1007/s00208-005-0640-8
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发表时间:
2004
影响因子:
1.4
通讯作者:
E. Szabó
中科院分区:
文献类型:
--
作者:
G. Elek;E. Szabó
Abstract.We prove that Connes’ Embedding Conjecture holds for the von Neumann algebras of sofic groups, that is sofic groups are hyperlinear. Hence we provide some new examples of hyperlinearity. We also show that the Determinant Conjecture holds for sofic groups as well. We introduce the notion of essentially free actions and amenable actions and study their properties.