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MATHEMATICAL LOGIC QUARTERLY
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/malq.202300017
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This study proves a dichotomy for o-minimal fields R expanded by a T-convex valuation ring and a compatible monomial group. It demonstrates that if T is power bounded, then this expansion of R is model complete, has a distal theory, and the definable sets are geometrically tame. However, if R defines an exponential function, then the natural numbers can be externally definable in our expansion, precluding any sort of model-theoretic tameness.
We prove a dichotomy for o-minimal fields R, expanded by a T-convex valuation ring (where T is the theory of R) and a compatible monomial group. We show that if T is power bounded, then this expansion of R is model complete (assuming that T is), it has a distal theory, and the definable sets are geometrically tame. On the other hand, if R defines an exponential function, then the natural numbers are externally definable in our expansion, precluding any sort of model-theoretic tameness.
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