Expansions of subfields of the real field by a discrete set
Expansions of subfields of the real field by a discrete set
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通过离散集扩展实域的子域
DOI:
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发表时间:
2010
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通讯作者:
Philipp Hieronymi
中科院分区:
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作者:
Philipp Hieronymi
Let K be a subfield of the real field, D be a 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.