关于推理 $\omega$ -逻辑及 $L_{\omega_1,\omega}$ 中的范畴唯一性
逻辑
2026-04-28 v2
摘要
本文提出了两个由 规则扩展的一阶逻辑。在每种情况下,我们都描述了其逻辑下理论为范畴唯一(具有唯一模型)的可数结构。在单一排序的推理 -逻辑中,罗宾逊的系统 和皮亚诺算术都变得范畴唯一。在两种排序的广义 -逻辑中,我们证明每个完整的 句子都定义了与具有适当 -规则的第一阶理论相同的结构类。这些结果依赖于证明推理规则对于逻辑的范畴唯一性,即它们唯一确定逻辑联结词和量词的某些真值条件。
引用
@article{arxiv.2602.02854,
title = {Categoricity for an inferential $\omega$-logic and in $L_{\omega_1,\omega}$},
author = {John T. Baldwin and Constantin C. Brîncuş},
journal= {arXiv preprint arXiv:2602.02854},
year = {2026}
}
备注
The original full version of this work has been divided into two separate papers. The present paper contains the technical results while a companion paper (Carnapian Frameworks and Categoricity of Arithmetic via Inferential $\omega$-logics) provides a philosophical discussion of these results