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Preprint Number 1250
1250. Itay Kaplan, Nicholas Ramsey, Saharon Shelah Local character of Kim-independence E-mail: Submission date: 10 July 2017 Abstract: We show that NSOP_{1} theories are exactly the theories in which Kim-independence satisfies a form of local character. In particular, we show that if T is NSOP_{1}, M \models T, and p is a type over M, then the collection of elementary submodels of size |T| over which p does not Kim-fork is a club of [M]^{|T|} and that this characterizes NSOP_{1}. Mathematics Subject Classification: Keywords and phrases: |
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