One-dimensional groups over an o-minimal structure
β Scribed by Vladimir Razenj
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 555 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0168-0072
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π SIMILAR VOLUMES
Let R be an o-minimal expansion of an ordered group (R; 0; 1; +; Β‘) with distinguished positive element 1: We ΓΏrst prove that the following are equivalent: (1) R is semi-bounded, (2) R has no poles, (3) R cannot deΓΏne a real closed ΓΏeld with domain R and order Β‘, (4) R is eventually linear and (5) e
We study subgroups G of GL n, R definable in o-minimal expansions M s Ε½ . Ε½. R, q, ΠΈ , . . . of a real closed field R. We prove several results such as: a G can be defined using just the field structure on R together with, if necessary, power Ε½ . functions, or an exponential function definable in M.
Let R be a one-dimensional noetherian domain containing the field Q of rational numbers. Let A be an A'-fibration over R. Then there exists HE A such that A is an A'-fibration over R[H]. As a consequence, if a,,, is free then A = R['].
## Abstract In this note we show: Let __R__ = γ__R__, <, +, 0, β¦γ be a semiβbounded (respectively, linear) oβminimal expansion of an ordered group, and __G__ a group definable in __R__ of linear dimension __m__ ([2]). Then __G__ is a definable extension of a bounded (respectively, definably compact