arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.06258cs.LOmath.LO
收藏

通用证明理论:半分析演算与一致插值

Universal Proof Theory: Semi-analytic Rules and Uniform Interpolation

Amirhossein Akbar Tabatabai, Raheleh Jalali

AI总结:

本文证明终止的半分析演算蕴含一致插值性质(UIP),为多种逻辑提供了统一的 UIP 证明方法,并指出模态逻辑 K4 和 S4 不存在终止的半分析演算。

摘要:

在 Craig 中,我们引入了语法上定义的、具有高度一般性的演算类,称为半分析演算。随后我们证明,任何具有半分析演算的足够强(模态)子结构逻辑都必须满足 Craig 插值性质。在本文中,我们证明:如果该演算在某种形式意义上也是终止的,则其逻辑具有一致插值性质(UIP)。这一结果具有重要应用。在正面方面,它提供了一种统一且模块化的方法来证明多种逻辑的 UIP,包括 FL_e、FL_ew、CFL_e、CFL_ew 及其 K、D、T 型模态扩展,以及 CPC、K 和 KD。然而,其更引人注目的后果在于负面方面。它将 Craig 中的负面结果扩展到具有 CIP 但没有 UIP 的逻辑。特别地,它表明模态逻辑 K4 和 S4 不存在终止的半分析演算。关键词:一致插值、序列演算、子结构逻辑、模态逻辑、子指数模态。

英文摘要:

In \cite{Craig}, we introduced a syntactically defined and highly general class of calculi known as \emph{semi-analytic}. We then demonstrated that any sufficiently strong (modal) substructural logic with a semi-analytic calculus must satisfy the Craig interpolation property. In this paper, we show that if the calculus is also terminating in a certain formal sense, then its logic has the Uniform Interpolation Property (UIP). This result has significant applications. On the positive side, it provides a uniform and modular method for proving UIP for various logics, including $\mathsf{FL_e}$, $\mathsf{FL_{ew}}$, $\mathsf{CFL_e}$, $\mathsf{CFL_{ew}}$, and their $K$, $D$, and $T$-type modal extensions, as well as $\mathsf{CPC}$, $\mathsf{K}$, and $\mathsf{KD}$. However, its more striking consequence lies in the negative direction. It extends the negative results of \cite{Craig} to logics with CIP but without UIP. In particular, it shows that the modal logics $\mathsf{K4}$ and $\mathsf{S4}$ do not have a terminating semi-analytic calculus. \textbf{keywords:} Uniform interpolation, Sequent calculi, Substructural logics, Modal logics, Subexponential modalities

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。

↑