Shelah's eventual categoricity conjecture in tame abstract elementary classes with primes

被引:3
|
作者
Vasey, Sebastien [1 ,2 ]
机构
[1] Carnegie Mellon Univ, Dept Math Sci, Wean Hall 6113, Pittsburgh, PA 15213 USA
[2] Harvard Univ, Dept Math, Sci Ctr, One Oxford St, Cambridge, MA 02138 USA
基金
瑞士国家科学基金会;
关键词
CLASSIFICATION-THEORY; UNCOUNTABLE MODELS; SATURATED MODELS; SUCCESSOR; SUPERSTABILITY; INDEPENDENCE; STABILITY; NUMBER;
D O I
10.1002/malq.201500068
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
A new case of Shelah's eventual categoricity conjecture is established: Let K be an abstract elementary class with amalgamation. Write mu := beth((LS(K))(2))+ and H-2 := beth((2 mu))+. Assume that K is H-2-tame and K->= H2 has primes over sets of the form M boolean OR {a}. If K is categorical in some lambda > H-2, then K is categorical in all lambda' >= H-2. The result had previously been established when the stronger locality assumptions of full tameness and shortness are also required. An application of the method of proof of the mentioned result is that Shelah's categoricity conjecture holds in the context of homogeneous model theory (this was known, but our proof gives new cases): If D be a homogeneous diagram in a first-order theory T and D is categorical in a lambda > |T|, then D is categorical in all lambda' >= min(lambda, beth(|T|)((2)())+). (C)2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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页码:25 / 36
页数:12
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