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  1. One-dimensional subgroups and connected components in non-Abelian P-adic definable groups.William Johnson & Ningyuan Yao - forthcoming - Journal of Symbolic Logic:1-19.
    We generalize two of our previous results on abelian definable groups in p-adically closed fields [12, 13] to the non-abelian case. First, we show that if G is a definable group that is not definably compact, then G has a one-dimensional definable subgroup which is not definably compact. This is a p-adic analogue of the Peterzil–Steinhorn theorem for o-minimal theories [16]. Second, we show that if G is a group definable over the standard model $\mathbb {Q}_p$, then $G^0 = G^{00}$. (...)
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  • Clustered cell decomposition in P-minimal structures.Saskia Chambille, Pablo Cubides Kovacsics & Eva Leenknegt - 2017 - Annals of Pure and Applied Logic 168 (11):2050-2086.
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  • Undefinability of Multiplication in Presburger Arithmetic with Sets of Powers.Chris Schulz - forthcoming - Journal of Symbolic Logic:1-15.
    We begin by proving that any Presburger-definable image of one or more sets of powers has zero natural density. Then, by adapting the proof of a dichotomy result on o-minimal structures by Friedman and Miller, we produce a similar dichotomy for expansions of Presburger arithmetic on the integers. Combining these two results, we obtain that the expansion of the ordered group of integers by any number of sets of powers does not define multiplication.
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  • Definable groups in models of Presburger Arithmetic.Alf Onshuus & Mariana Vicaría - 2020 - Annals of Pure and Applied Logic 171 (6):102795.
    This paper is devoted to understand groups definable in Presburger Arithmetic. We prove the following theorems: Theorem 1. Every group definable in a model of Presburger Arithmetic is abelian-by-finite. Theorem 2. Every bounded abelian group definable in a model of (Z, +, <) Presburger Arithmetic is definably isomorphic to (Z, +)^n mod out by a lattice.
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  • Expansions of Presburger arithmetic with the exchange property.Nathanaël Mariaule - 2021 - Mathematical Logic Quarterly 67 (4):409-419.
    Let G be a model of Presburger arithmetic. Let be an expansion of the language of Presburger. In this paper, we prove that the ‐theory of G is ‐minimal iff it has the exchange property and is definably complete (i.e., any bounded definable set has a maximum). If the ‐theory of G has the exchange property but is not definably complete, there is a proper definable convex subgroup H. Assuming that the induced theories on H and are definable complete and (...)
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  • Integration and cell decomposition in p-minimal structures.Pablo Cubides Kovacsics & Eva Leenknegt - 2016 - Journal of Symbolic Logic 81 (3):1124-1141.
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  • Definable completeness of P-minimal fields and applications.Pablo Cubides Kovacsics & Françoise Delon - 2022 - Journal of Mathematical Logic 22 (2).
    Journal of Mathematical Logic, Volume 22, Issue 02, August 2022. We show that every definable nested family of closed and bounded subsets of a P-minimal field K has nonempty intersection. As an application we answer a question of Darnière and Halupczok showing that P-minimal fields satisfy the “extreme value property”: for every closed and bounded subset [math] and every interpretable continuous function [math] (where [math] denotes the value group), f(U) admits a maximal value. Two further corollaries are obtained as a (...)
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  • Unexpected imaginaries in valued fields with analytic structure.Deirdre Haskell, Ehud Hrushovski & Dugald Macpherson - 2013 - Journal of Symbolic Logic 78 (2):523-542.
    We give an example of an imaginary defined in certain valued fields with analytic structure which cannot be coded in the ‘geometric' sorts which suffice to code all imaginaries in the corresponding algebraic setting.
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