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arXiv 1901.09077math.CTmath.LO
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度量空间的范畴语义与连续逻辑

Categorical semantics of metric spaces and continuous logic

Simon Cho

摘要:

使用范畴的度量空间作为模板,我们开发了一个度量模拟的范畴语义的经典/直觉主义逻辑,并表明,自然概念的谓词在这个“连续语义”是等价的一个先验的单独概念的谓词在连续逻辑,这是独立的模型理论家研究,并发现各种应用。我们通过把度量空间范畴中的实区间[0,1]表示为一个“连续子对象分类器”来证明这一等价性,它不仅给出了两个谓词概念之间的对应关系,而且给出了连续语义中的自然量化概念与连续逻辑中已有的量化概念之间的对应关系。一路上,我们制定了它的意思是一个给定的范畴表现得像度量空间的范畴,然后表明,任何这样的类别支持上述连续语义。作为一个应用,我们表明,范畴的预层的度量空间的例子,事实上,甚至拥有连续的子对象分类。

英文摘要:

Using the category of metric spaces as a template, we develop a metric analogue of the categorical semantics of classical/intuitionistic logic, and show that the natural notion of predicate in this "continuous semantics" is equivalent to the a priori separate notion of predicate in continuous logic, a logic which is independently well-studied by model theorists and which finds various applications. We show this equivalence by exhibiting the real interval [0,1] in the category of metric spaces as a "continuous subobject classifier" giving a correspondence not only between the two notions of predicate, but also between the natural notion of quantification in the continuous semantics and the existing notion of quantification in continuous logic. Along the way, we formulate what it means for a given category to behave like the category of metric spaces, and afterwards show that any such category supports the aforementioned continuous semantics. As an application, we show that categories of presheaves of metric spaces are examples of such, and in fact even possess continuous subobject classifiers.

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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