The Complexity of Theorem Proving in Circumscription and Minimal Entailment

  • Olaf Beyersdorff
  • Leroy Chew
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8562)


We provide the first comprehensive proof-complexity analysis of different proof systems for propositional circumscription. In particular, we investigate two sequent-style calculi: MLK defined by Olivetti [28] and CIRC introduced by Bonatti and Olivetti [8], and the tableaux calculus NTAB suggested by Niemelä [26]. In our analysis we obtain exponential lower bounds for the proof size in NTAB and CIRC and show a polynomial simulation of CIRC by MLK. This yields a chain NTAB <  p CIRC <  p MLK of proof systems for circumscription of strictly increasing strength with respect to lengths of proofs.


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Olaf Beyersdorff
    • 1
  • Leroy Chew
    • 1
  1. 1.School of ComputingUniversity of LeedsUK

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