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Article Dans Une Revue Inventiones Mathematicae Année : 2016

Extensions of amenable groups by recurrent groupoids

Kate Juschenko
  • Fonction : Auteur
Volodymyr Nekrashevych
  • Fonction : Auteur

Résumé

We show that amenability of a group acting by homeomorphisms can be deduced from a certain local property of the action and recurrency of the orbital Schreier graphs. This covers amenability of a wide class groups, the amenability of which was an open problem, as well as unifies many known examples to one general proof. In particular, this includes Grigorchuk's group, Basilica group, the full topological group of Cantor minimal system, groups acting on rooted trees by bounded automorphisms, groups generated by finite automata of linear activity growth, groups that naturally appear in holomorphic dynamics.
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Dates et versions

hal-01219523 , version 1 (06-02-2024)

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Kate Juschenko, Volodymyr Nekrashevych, Mikael de La Salle. Extensions of amenable groups by recurrent groupoids. Inventiones Mathematicae, 2016, 206 (3), pp.837 - 867. ⟨10.1007/s00222-016-0664-6⟩. ⟨hal-01219523⟩

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