The Complexity of Analytic Tableaux

Journal of Symbolic Logic 71 (3):777 - 790 (2006)

Alasdair Urquhart
University of Toronto, St. George
The method of analytic tableaux is employed in many introductory texts and has also been used quite extensively as a basis for automated theorem proving. In this paper, we discuss the complexity of the system as a method for refuting contradictory sets of clauses, and resolve several open questions. We discuss the three forms of analytic tableaux: clausal tableaux, generalized clausal tableaux, and binary tableaux. We resolve the relative complexity of these three forms of tableaux proofs and also resolve the relative complexity of analytic tableaux versus resolution. We show that there is a quasi-polynomial simulation of tree resolution by analytic tableaux; this simulation is close to optimal, since we give a matching lower bound that is tight to within a polynomial
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DOI 10.2178/jsl/1154698576
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The Complexity of Propositional Proofs.Nathan Segerlind - 2007 - Bulletin of Symbolic Logic 13 (4):417-481.

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