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Keywords:

  • Intuitionistic logic;
  • propositional second order logic;
  • tableau calculus;
  • disjunction property;
  • explicit definability property

Abstract

In this paper we propose a Kripke-style semantics for second order intuitionistic propositional logic and we provide a semantical proof of the disjunction and the explicit definability property. Moreover, we provide a tableau calculus which is sound and complete with respect to such a semantics. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)