Von Neumann algebras of sofic groups with β(2)1=0 are strongly 1-bounded
Von Neumann algebras of sofic groups with β(2)1=0 are strongly 1-bounded
复制标题
β(2)1=0 的 sofic 群的冯诺依曼代数是强 1 有界的
DOI:
10.7900/jot.2019oct21.2270
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发表时间:
2016
影响因子:
0.8
通讯作者:
D. Shlyakhtenko
中科院分区:
文献类型:
--
作者:
D. Shlyakhtenko
We show that if Γ is a finitely generated finitely presented sofic group with zero first L2-Betti number, then the von Neumann algebra L(Γ) is strongly 1-bounded in the sense of Jung. In particular, L(Γ)≆L(Λ) if Λ is any group with free entropy dimension >1, for example a free group. The key technical result is a short proof of an estimate of Jung