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Preprint Number 1094
1094. Artem Chernikov, Sergei Starchenko and Margaret E. M. Thomas Ramsey growth in some NIP structures E-mail: Submission date: 19 September 2016 Abstract: We investigate bounds in Ramsey theorem for relations definable in NIP structures. We generalize a theorem of Bukh and Matoušek [B. Bukh, J. Matoušek. Erdös-Szekeres-type statements: Ramsey function and decidability in dimension 1, Duke Mathematical Journal 163.12 (2014): 2243-2270] from the semialgebraic case to arbitrary polynomially bounded o-minimal expansions of R, and show that it doesn't hold in R_{\exp}. We also prove an analog for relations definable in the field of p-adics. Generalizing [D. Conlon, J. Fox, J. Pach, B. Sudakov, A. Suk Ramsey-type results for semi-algebraic relations, Transactions of the American Mathematical Society 366.9 (2014): 5043-5065], we show that in distal structures the upper bound for k-ary definable relations is given by the exponential tower of height k-1. Mathematics Subject Classification: 03C45, 05C35, 05D10, 05C2 Keywords and phrases: |
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