2 research outputs found
Subframization and stabilization for superintuitionistic logics
With each superintuitionistic logic (si-logic for short), we associate its downward and upward subframizations and characterize them by means of Zakharyaschevâs canonical formulas, as well as by embedding si-logics into the extensions of the propositional lax logic PLLâ . In an analogous fashion, with each si-logic, we associate its downward and upward stabilizations and characterize them by means of stable canonical formulas, as well as by embedding si-logics into extensions of the intuitionistic S4â