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Les automorphismes d'un ensemble fortement minimal

Published online by Cambridge University Press:  12 March 2014

Daniel Lascar
Daniel Lascar*
Affiliation:
Équipe de Logique Mathématique, Université Paris-VIIet CNRS, 75251 Paris, France, E-mail: dl@frmap711.bitnet
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Abstract

Let be a countable saturated structure, and assume that D(v) is a strongly minimal formula (without parameter) such that is the algebraic closure of D(). We will prove the two following theorems:

Theorem 1. If G is a subgroup of Aut() of countable index, there exists a finite set A in such that every A-strong automorphism is in G.

Theorem 2. Assume that G is a normal subgroup of Aut() containing an element g such that for all n there exists X ⊆ D() such that Dim(g(X)/X) > n. Then every strong automorphism is in G.

Type
Research Article
Information
The Journal of Symbolic Logic , Volume 57 , Issue 1 , March 1992 , pp. 238 - 251
Copyright
Copyright © Association for Symbolic Logic 1992

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References

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