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arxiv: 0906.0107 · v1 · pith:QRH4UK4Dnew · submitted 2009-05-30 · 🧮 math.GR · math.FA

About amenability of subgroups of the group of diffeomorphisms of the interval

classification 🧮 math.GR math.FA
keywords groupamenabilitydiffeomorphismsintervalsubgroupsaveragingcontinuousdiff
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Averaging linear functional on the space continuous functions of the group of diffeomorphisms of interval is found. Amenability of several discrete subgroups of the group of diffeomorphisms $\Diff^3([0,1])$ of interval is prove. In particular, a solution of the problem of amenability of the Thompson's group $F$ is given.

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  1. Superharmonic functions on the Lamplighter graph of Thompson's group F

    math.GR 2019-07 unverdicted novelty 5.0

    Extends a superharmonic-function amenability test to group actions and applies it to Thompson's group F without resolving amenability.