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arxiv: 1204.2132 · v3 · pith:SJ24RBOEnew · submitted 2012-04-10 · 🧮 math.GR

Cantor systems, piecewise translations and simple amenable groups

classification 🧮 math.GR
keywords amenablegroupssimplestatesbernoullicantorclassicalconstructing
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We provide the first examples of finitely generated simple groups that are amenable (and infinite). This follows from a general existence result on invariant states for piecewise-translations of the integers. The states are obtained by constructing a suitable family of densities on the classical Bernoulli space.

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