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zbMath0795.03026MaRDI QIDQ3363966

Larisa L. Maksimova

Publication date: 1992

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

ultrapower equational class normal modal logics modal algebras Beth definability theorem normal extensions of the modal logic K4 two- element Kripke frame

Mathematics Subject Classification ID

Modal logic (including the logic of norms) (03B45) Interpolation, preservation, definability (03C40)

Related Items (3)

Model completions and r-Heyting categories ⋮ Explicit definitions of implicitly definable objects in some modal logics ⋮ Common knowledge does not have the Beth property

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