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arXiv 2402.01245math.LO
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经典框架下的连续逻辑

Continuous logic in a classical setting

Claudio Agostini, Stefano Baratella, Silvia Barbina, Luca Motto Ros, Domenico Zambella

AI总结:

本文在经典框架下推广了基于正公式的连续逻辑方法,为更一般的紧致豪斯多夫空间上的模型类引入了初等性、紧致性、饱和性等基本模型论工具。

摘要:

设 $\mathcal{L}$ 为一阶双排序语言,并考虑形如 $\langle M, X \rangle$ 的一类 $\mathcal{L}$-结构,其中 $M$ 在第一排序中变化,而 $X$ 在第二排序中固定,且假设 $X$ 为紧致豪斯多夫空间。当 $X$ 是实数线的紧致子集时,处理此类类别的模型论方法之一是通过连续值逻辑,如 [Ben Yaacov-Berenstein-Henson-Usvyatsov 2010] 所述。在此之前,Henson 和 Iovino 提出了一种基于正公式概念的方法 [Henson-Iovino 2002]。他们的工作针对 Banach 空间的模型论。本文表明,对于更一般的模型类别,类似的方法是可行的。我们引入了初等性、紧致性、饱和性、量词消去及其他基本工具的适当版本,并发展了基础模型论。

英文摘要:

Let $\mathcal{L}$ be a first-order two-sorted language and consider a class of $\mathcal{L}$-structures of the form $\langle M, X \rangle$ where $M$ varies among structures of the first sort, while $X$ is fixed in the second sort, and it is assumed to be a compact Hausdorff space. When $X$ is a compact subset of the real line, one way to treat classes of this kind model-theoretically is via continuous-valued logic, as in [Ben Yaacov-Berenstein-Henson-Usvyatsov 2010]. Prior to that, Henson and Iovino proposed an approach based on the notion of positive formulas [Henson-Iovino 2002]. Their work is tailored to the model theory of Banach spaces. Here we show that a similar approach is possible for a more general class of models. We introduce suitable versions of elementarity, compactness, saturation, quantifier elimination and other basic tools, and we develop basic model theory.

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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