arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2609.20184math.LO

一般向量空间自同态的模型论 V:o-极小情形

Model Theory of Generic Vector Space Endomorphisms V: The o-Minimal Case

Leon Chini

首次发表
浏览论文内容

中文总结 AI 辅助

本文研究向量空间自同态模型伴体在o-极小情形下的推广,构造了一族具有TP2、SOP和NATP性质的新理论,以及不同dp-秩的distal非o-极小理论。

中文摘要 AI 辅助

本文进一步研究作用在向量空间(可能带有额外结构)上的自同态的模型伴体。设 $T$ 是一个模型完备理论,其 $\varnothing$-定义了一个无限 $K$-向量空间 $\mathbb{V}$。在之前的工作中,我们引入了一族理论 $\{T^C_\theta: C \in \mathcal{C}\}$,它们是理论 $T_\theta:= T \cup \{\text{“$\theta$ 是 $\mathbb{V}$ 的自同态”}\}$ 的扩张,参数化了所有形如 $$ T_\theta \cup \left\{\sum\nolimits_{k}\bigcap\nolimits_{l}\operatorname{Ker}(\rho_{j, k, l}[\theta]) = \sum\nolimits_{k}\bigcap\nolimits_{l} \operatorname{Ker}(\eta_{j, k, l}[\theta]): j \in \mathcal{J}\right\}, $$ 的一致扩张,其中所有求和与交集都是有限的,所有 $\rho[\theta]$ 和 $\eta[\theta]$ 都是将 $\theta$ 代入的 $K$ 上的多项式,而 $\mathcal{J}$ 是某个可能无限的指标集。我们还给出了一个充分条件,该条件蕴含每个 $T^C_\theta$ 都有模型伴体 $T\theta^C$。在本文中,我们研究 $T$ 是有序群理论的 o-极小扩张的情形。如此,我们得到了一族新的理论,它们具有 $\operatorname{TP}_2$ 和 $\operatorname{SOP}$ 性质,并且是 $\operatorname{NATP}$ 的,同时还有具有各种 $\operatorname{dp}$-秩(带或不带交换性质)的 distal 非 o-极小理论。

英文摘要

This paper further studies the model companion of an endomorphism acting on a vector space, possibly with extra structure. Let $T$ be a model-complete theory that $\varnothing$-defines an infinite $K$-vector space $\mathbb{V}$. In previous work, we introduced a family $\{T^C_θ: C \in \mathcal{C}\}$ of extensions of the theory $T_θ:= T \cup \{\text{``$θ$ is an endomorphism of $\mathbb{V}$''}\}$ that parameterizes all consistent extensions of the form $$ T_θ\cup \left\{\sum\nolimits_{k}\bigcap\nolimits_{l}\operatorname{Ker}(ρ_{j, k, l}[θ]) = \sum\nolimits_{k}\bigcap\nolimits_{l} \operatorname{Ker}(η_{j, k, l}[θ]) : j \in \mathcal{J}\right\}, $$ where all sums and intersections are finite, all the $ρ[θ]$'s and $η[θ]$'s are polynomials over $K$ with $θ$ plugged in, and $\mathcal{J}$ is some possibly infinite index set. We also presented a sufficient condition that implies that every $T^C_θ$ has a model companion $Tθ^C$. In this paper, we study the case where $T$ is an o-minimal expansion of the theory of ordered groups. Doing so, we obtain a new family of theories that have $\operatorname{TP}_2$ and $\operatorname{SOP}$, and are $\operatorname{NATP}$, as well as distal non-o-minimal theories of various $\operatorname{dp}$-ranks with and without the exchange property.

补充信息

↑