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Preprint Number 286
286. Philipp Hieronymi
Expansions of subfields of the real field by a discrete set
Submission date: 6 January 2011.
Let K be a subfield of the real field, D be a closed and discrete subset of K and f : D^n -> K be a function such that f(D^n) is somewhere dense. Then (K,f) defines the set of integers. We present several applications of this result. We show that K expanded by predicates for different cyclic multiplicative subgroups defines the set of integers. Moreover, we prove that every definably complete expansion of a subfield of the real field satisfies an analogue of the Baire Category Theorem.
Mathematics Subject Classification: 03C64, 54E52
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