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arXiv 2602.09470math.LO
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可数语言的可证逻辑强完备性

Strong Completeness of Provability Logic for Uncountable Languages

School of Mathematics, Institute for Research in Fundamental Sciences (IPM)(基础科学研究所数学学院);Institut für diskrete Mathematik und Geometrie, TU Wien(维也纳工业大学离散数学与几何研究所)

Mohammad Golshani, Grigorii Stepanov, Reihane Zoghifard

AI总结:

本文利用Erdős-Rado定理证明了对于特定基数的模态语言,GL逻辑在广义Icard拓扑下不满足强完备性,并引入了两种拓扑空间类以证明GL和GL.3在特定语言下满足强完备性。

摘要:

对于一个序数λ>0,我们利用Erdős--Rado划分定理,证明了对于基数为(2^{|λ|+aleph_0})^{+}的模态语言,GL逻辑在装备广义Icard拓扑mathcal{I}_λ和tau_{c}+λ的模型上不满足强完备性。具体而言,我们证明了对于此类语言,存在一个GL一致的公式集合,既没有(Θ, mathcal{I}_λ)-模型,也没有(Θ, tau_{c}+λ)-模型。我们还引入了两种自然的拓扑空间类,称为λ-花环空间和超线性λ-花环空间,并证明它们分别使GL和GL.3在语言基数为λ时满足强完备性。

英文摘要:

For an ordinal $λ>0$, we use the Erdős--Rado partition theorem to prove the failure of strong completeness of $\mathsf{GL}$ for modal languages of cardinality $(2^{|λ|+\aleph_0})^{+}$ with respect to models on ordinals equipped with the generalized Icard topologies $\mathcal{I}_λ$ and ${τ_{c}}_{+λ}$. Specifically, we show that for such languages there exists a $\mathsf{GL}$-consistent set of formulas having neither $(Θ, \mathcal{I}_λ)$-model nor $(Θ, {τ_{c}}_{+λ})$-model. We also introduce two kinds of natural classes of topological spaces, called \emph{ $λ$-bouquet spaces} and \emph{ultralinear $λ$-bouquet spaces}, and prove that they yield strong completeness of $\mathsf{GL}$ and $\mathsf{GL}.3$ respectively for languages of cardinality $λ$.

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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