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arXiv 1002.3762math.LO
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不引入新开集的展开式

Expansions which introduce no new open sets

Gareth Boxall, Philipp Hieronymi

摘要:

我们考虑的问题,当一个拓扑结构的扩展有属性,每一个开集定义的扩展是可定义的原始结构。这个问题与Dolich、Miller和Steinhorn最近关于具有O-极小开核的性质的工作有关,并受到其启发。我们在一个相当一般的背景下回答这个问题,并提供在实践中往往很容易检查的条件。我们给一个特殊的情况下,由一个通用谓词的扩展进一步的特点。

英文摘要:

We consider the question of when an expansion of a topological structure has the property that every open set definable in the expansion is definable in the original structure. This question is related to and inspired by recent work of Dolich, Miller and Steinhorn on the property of having o-minimal open core. We answer the question in a fairly general setting and provide conditions which in practice are often easy to check. We give a further characterisation in the special case of an expansion by a generic predicate.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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