核心概念
The author establishes the finite frame property for CS4, IS4, GS4, GS4c, and S4I modal logics through birelational semantics.
要約
The content discusses the significance of constructive S4 modal logics in computer science and formal proof assistants. It explores various logics related to IS4 and proves their finite frame properties. The paper presents alternative birelational semantics for GS4 and GS4c, providing insights into fuzzy logic applications. The strong completeness of these logics is demonstrated using canonical model arguments.
統計
Establishing the finite frame property immediately establishes decidability.
The proofs yield NEXPTIME upper bounds.
Godel K has a complexity of pspace-complete for the box fragment.
Modal logics over accessibility-fuzzy frames have been axiomatized by Caicedo and Rodriguez.
The logic IntS4 was already known to have the finite model property with different semantics.