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- W2342806294 abstract "Let M be an o-minimal expansion of a densely ordered group and H be a pairwise disjoint collection of dense subsets of M such that ⋃H is definably independent in M. We study the structure (M,(H)H∈H). Positive results include that every open set definable in (M,(H)H∈H) is definable in M, the structure induced in (M,(H)H∈H) on any H0∈H is as simple as possible (in a sense that is made precise), and the theory of (M,(H)H∈H) eliminates imaginaries and is strongly dependent and axiomatized over the theory of M in the most obvious way. Negative results include that (M,(H)H∈H) does not have definable Skolem functions and is neither atomic nor satisfies the exchange property. We also characterize (model-theoretic) algebraic closure and thorn forking in such structures. Throughout, we compare and contrast our results with the theory of dense pairs of o-minimal structures." @default.
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- W2342806294 date "2016-08-01" @default.
- W2342806294 modified "2023-09-26" @default.
- W2342806294 title "Expansions of o-minimal structures by dense independent sets" @default.
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- W2342806294 doi "https://doi.org/10.1016/j.apal.2016.04.003" @default.
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