We present a simple logic that combines, in a conservative way, the implicative fragments of both classical and intuitionistic logics, thus settling a problem posed by Dov Gabbay in [5]. We also show that the logic can be given a nice complete axiomatization by adding four simple mixed axioms to the usual axiomatizations of classical and intuitionistic implications.

Intersection types characterize properties on lambda-terms such as head, weak and strong normalization. One can establish relations between intuitionistic logic and intersection types with idempotence. Here we consider a type system without idempotence and we underline common traits with intuitionistic multiplicative linear logic. We analyse head normalization to try and get properties such as ...

This paper introduces a non-clausal connection calculus for intuitionistic first-order logic. It is an extension of the non-clausal connection calculus for classical logic by prefixes and an additional prefix unification, which encode the Kripke semantics of intuitionistic logic. nanoCoP-i is a first implementation of this intuitionistic non-clausal connection calculus. Details of the compact P...

Models of complex systems are widely used in the physical and social sciences, and the concept of layering, typically building upon graph-theoretic structure, is a common feature. We describe an intuitionistic substructural logic that gives an account of layering. As in bunched systems, the logic includes the usual intuitionistic connectives, together with a non-commutative, non-associative con...

This paper establishes the normalisation of natural deduction or lambda calculus formulation of Intuitionistic Non Commutative Logic — which involves both commutative and non commutative connectives. This calculus first introduced by de Groote and as opposed to the classical version by Abrusci and Ruet admits a full entropy which allow order to be relaxed into any suborder. Our result also incl...