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arxiv: 1502.04513 · v2 · pith:G6O37KBInew · submitted 2015-02-16 · 🧮 math.LO · math.CO

VC-sets and generic compact domination

classification 🧮 math.LO math.CO
keywords compactdominationgenericamenableborderclosedconstructiblecountable
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Let X be a closed subset of a locally compact second countable group G whose family of translates has finite VC-dimension. We show that the topological border of X has Haar measure 0. Under an extra technical hypothesis, this also holds if X is constructible. We deduce from this generic compact domination for definably amenable NIP groups.

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