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Preprint Number 807

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807. Saharon Shelah
Hanf number for the strictly stable cases
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Submission date: 1 December 2014.

Abstract:

[Sh:1048]
Suppose t = (T,T_1, p) is a triple of two theories in vocabularies tau subset tau_1 of cardinality lambda and a tau_1-type p over the empty set; here we fix T and assume it is stable. We show the Hanf number for the property: “there is a model M_1 of T_1 which omits p, but M_1 restricted to tau is saturated” is larger than the Hanf number of L_{lambda^+, kappa} but smaller than the Hanf number of L_{(2^lambda)^+, kappa} when T is stable with kappa = kappa(T).

Mathematics Subject Classification: 03C75, 03C45, 03C55, 03C50

Keywords and phrases:

Full text arXiv 1412.0428: pdf, ps.


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