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arxiv: 1102.2494 · v1 · pith:K7SJZ53Onew · submitted 2011-02-12 · 🧮 math.LO

Topology of definable abelian groups in o-minimal structures

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keywords definablyabeliandefinabledimensiono-minimalcaseclosedcompact
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In this note we show that every definably connected, definably compact abelian definable group in an o-minimal expansion of a real closed field of dimension not 4 is definably homeomorphic to a torus of the same dimension. Moreover, in the semialgebraic case the result holds for all dimensions.

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