This is a preview. Log in through your library . Abstract A propositional system of modal logic is second-order if it contains quantifiers ∀p and ∃p, which, in the standard interpretation, are ...
Studia Logica: An International Journal for Symbolic Logic, Vol. 48, No. 4 (1989), pp. 449-459 (11 pages) We prove that the intuitionistic sentential calculus is Ł-decidable (decidable in the sense of ...
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