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Preprint Number 1224

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1224. Itaï Ben Yaacov (ICJ), Frank Wagner (ICJ)
A metric version of Schlichting's Theorem
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Submission date: 17 May 2017

Abstract:

If F is a type-definable family of commensurable subsets, subgroups or sub-vector spaces in a metric structure, then there is an invariant subset, subgroup or sub-vector space commensurable with F. This in particular applies to type-definable or hyper-definable objects in a classical first-order structure.

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Full text arXiv 1705.06060: pdf, ps.


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