arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1409.7488cs.LO
收藏

论一阶逻辑量词结构层次的严格性

On the strictness of the quantifier structure hierarchy in first-order logic

Yuguo He

摘要:

本文研究了一阶逻辑中的一种自然层次结构,即量词结构层次结构,给出了基于结构量词资源的一阶公式的系统分类。我们定义了一个变种的Escherichfeucht-Fraisse游戏的特点量词类,并用它来证明,这个层次结构是严格的有限结构,使用策略组合。此外,我们证明了这个层次结构是严格的,甚至有序的有限结构,这是有趣的描述复杂性的背景下。

英文摘要:

We study a natural hierarchy in first-order logic, namely the quantifier structure hierarchy, which gives a systematic classification of first-order formulas based on structural quantifier resource. We define a variant of Ehrenfeucht-Fraisse games that characterizes quantifier classes and use it to prove that this hierarchy is strict over finite structures, using strategy compositions. Moreover, we prove that this hierarchy is strict even over ordered finite structures, which is interesting in the context of descriptive complexity.

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。

↑