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Compression of Propositional Resolution Proofs via Partial Regularization

  • Pascal Fontaine
  • Stephan Merz
  • Bruno Woltzenlogel Paleo
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6803)

Abstract

This paper describes two algorithms for the compression of propositional resolution proofs. The first algorithm, RecyclePivots-WithIntersection, performs partial regularization, removing an inference η when it is redundant in the sense that its pivot literal already occurs as the pivot of another inference located below in the path from η to the root of the proof. The second algorithm, LowerUnits, delays the resolution of (both input and derived) unit clauses, thus removing (some) inferences having the same pivot but possibly occurring also in different branches of the proof.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Pascal Fontaine
    • 1
  • Stephan Merz
    • 1
  • Bruno Woltzenlogel Paleo
    • 1
  1. 1.University of Nancy and INRIANancyFrance

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