Schematic Refutations of Formula Schemata

02/21/2019

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by   David Cerna, et al.

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Johannes Kepler University Linz

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Logic Industries

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Proof schemata are infinite sequences of proofs which are defined inductively. In this paper we present a general framework for schemata of terms, formulas and unifiers and define a resolution calculus for schemata of quantifier-free formulas. The new calculus generalizes and improves former approaches to schematic deduction. As an application of the method we present a schematic refutation formalizing a proof of a weak form of the pigeon hole principle.