A First Order Extension of Stålmarck's Method
Paper i proceeding, 2005

We describe an extension of Stålmarck's method in First Order Logic. Stålmarck's method is a tableaux-like theorem proving method for propositional logic, that uses a branch-and-merge rule known as the dilemma rule. This rule opens two branches and later merges them, by retaining their common consequences. The propositional version does this with normal set intersection, while the FOL version searches for pairwise unifiable formulae from the two branches. The proof procedure attempts to find proofs with as few simultaneously open branches as possible. We present the proof system and a proof procedure, and show soundness and completeness. We also present benchmarks for an implementation of the proof procedure.


stålmarck's method

automated theorem proving

first order logic


Magnus Björk

Chalmers, Data- och informationsteknik, Datavetenskap

Logic for Programming, Artificial Intelligence, and Reasoning, 2005, Montego Bay, Jamaica

LNAI 3835 276-291
978-3-540-30553-8 (ISBN)


Datavetenskap (datalogi)



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