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Preprint Number 1102
1102. Kirsten Eisentraeger and Travis Morrison Universally and existentially definable subsets of global fields E-mail: Submission date: 30 September 2016 Abstract: We show that rings of S-integers of a global function field K of odd
characteristic are first-order universally definable in K. This extends work
of Koenigsmann and Park who showed the same for Z in Q
and the ring of integers in a number field, respectively. Mathematics Subject Classification: 11U05, 11R37 Keywords and phrases: |

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