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arXiv 2404.04893math.LO
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论 GLP 的合一问题

On the unification problem for GLP

Lev D. Beklemishev

AI总结:

本文研究多模态可证性逻辑 GLP 的合一类型,证明其为零元,给出公式 [1]p 的无穷完备合一元集,并说明可合一性判定可解。

摘要:

我们证明,在至少包含两个模态词和一个变元的语言中,多模态可证性逻辑 GLP 具有零元合一类型。更具体地说,我们证明公式 [1]p 不存在极大合一元,并为其构造一个无穷的完备合一元集合。此外,我们讨论判定给定公式在 GLP 中是否可合一的算法问题,并指出该问题有肯定解。最后,我们陈述 GLP 的合一问题与可容许性问题的算术对应形式,并提出若干开放问题。

英文摘要:

We show that the polymodal provability logic GLP, in a language with at least two modalities and one variable, has nullary unification type. More specifically, we show that the formula [1]p does not have maximal unifiers, and exhibit an infinite complete set of unifiers for it. Further, we discuss the algorithmic problem of whether a given formula is unifiable in GLP and remark that this problem has a positive solution. Finally, we state the arithmetical analogues of the unification and admissibility problems for GLP and formulate a number of open questions.

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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