Logics Containing wK4: Selection à la Fine

We generalize Fine's Iterative Selection Method to the weakly transitive setting.In particular, this provides a transparent frame-theoretic proof of the finite model property for (strongly) cofinal subframe logics extending wK4, which was previously established using algebraic methods.Using the same construction, we generalize Fine's Finite Width Theorem to the weakly transitive setting, connecting these two celebrated theorems of Fine.

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Publication Details

Journal
Electronic Proceedings in Theoretical Computer Science
Published
2026-06-28
DOI
https://doi.org/10.4204/eptcs.447.38
Primary Topic
Advanced Algebra and Logic
Type
article
Field-Weighted Citation Impact
0.00

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article

Logics Containing wK4: Selection à la Fine

Simon Santschi, Niels C. Vooijs
Electronic Proceedings in Theoretical Computer Science
Advanced Algebra and Logic
article

Logics Containing wK4: Selection à la Fine

Simon Santschi, Niels C. Vooijs
article en

Abstract

We generalize Fine's Iterative Selection Method to the weakly transitive setting.In particular, this provides a transparent frame-theoretic proof of the finite model property for (strongly) cofinal subframe logics extending wK4, which was previously established using algebraic methods.Using the same construction, we generalize Fine's Finite Width Theorem to the weakly transitive setting, connecting these two celebrated theorems of Fine.

Electronic Proceedings in Theoretical Computer ScienceVol. 447
National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Openalex Percentile: Top 6%
Advanced Algebra and Logic
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