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Kazhdan groups have cost 1
Inventiones mathematicae ( IF 3.1 ) Pub Date : 2020-04-02 , DOI: 10.1007/s00222-020-00967-6
Tom Hutchcroft , Gábor Pete

We prove that every countably infinite group with Kazhdan's property (T) has cost 1, answering a well-known question of Gaboriau. It remains open if they have fixed price 1.

中文翻译:

Kazhdan 团体已花费 1

我们证明了每个具有 Kazhdan 性质 (T) 的可数无限群的成本为 1,回答了 Gaboriau 的一个著名问题。如果它们的固定价格为 1,则它保持打开状态。
更新日期:2020-04-02
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