Logic Journal of IGPL Advance Access published online on July 13, 2007
Logic Journal of IGPL, doi:10.1093/jigpal/jzm015
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The Basic Constructive Logic for a Weak Sense of Consistency defined with a Propositional Falsity Constant
E-mail: gemmarobles{at}gmail.com
Universidad de Salamanca, Edificio FES, Campus Unamuno, 37007, Salamanca, Spain. E-mail: sefus{at}usal.es
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The logic BKc1 is the basic constructive logic in the ternary relational semantics (without a set of designated points) adequate to consistency understood as the absence of the negation of any theorem. Negation is introduced in BKc1 with a negation connective. The aim of this paper is to define the logic BKc1F. In this logic negation is introduced via a propositional falsity constant. We prove that BKc1 and BKc1F are definitionally equivalent.
Key Words: constructive negation substructural logics ternary relational semantics definitional equivalence
Received for publication 17 May 2007.
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