On rational limits of Shelah–Spencer graphs

On rational limits of Shelah–Spencer graphs
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论 Shelah-Spencer 图的有理极限

DOI:
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发表时间:
2012
期刊:
Journal of Symbolic Logic (JSL)
影响因子:
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通讯作者:
M. Laskowski
M. Laskowski
中科院分区:
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文献类型:
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作者:
Justin D. Brody;M. Laskowski

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给出(0,1)中一个收敛到有理数的序列{αn},我们考察了作为谢拉-斯宾塞图G()的极限得到的结构的模型论性质。我们表明,在大多数情况下,模型理论要么表现得非常好,要么非常狂野,并描述了每种情况发生的时间。
Abstract Given a sequence {α n } in (0,1) converging to a rational, we examine the model theoretic properties of structures obtained as limits of Shelah-Spencer graphs G(). We show that in most cases the model theory is either extremely well-behaved or extremely wild, and characterize when each occurs.