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arXiv · 1504.03358

On the number of variables in undecidable superintuitionistic propositional calculi

Grigoriy V. Bokov
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Abstract

In this paper, we construct an undecidable 3-variable superintuitionistic propositional calculus, i.e., a finitely axiomatizable extension of the intuitionistic propositional calculus with axioms containing only 3 variables. Since there are no 2-variable superintuitionistic propositional calculi, this is the minimal possible number of variables.

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BibTeXRIS

Grigoriy V. Bokov. 2015-04-13. On the number of variables in undecidable superintuitionistic propositional calculi. https://arxiv.org/abs/1504.03358

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