Abstract
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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Beyersdorff, O., Chew, L. (2014). The Complexity of Theorem Proving in Circumscription and Minimal Entailment. In: Demri, S., Kapur, D., Weidenbach, C. (eds) Automated Reasoning. IJCAR 2014. Lecture Notes in Computer Science(), vol 8562. Springer, Cham. https://doi.org/10.1007/978-3-319-08587-6_32
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DOI: https://doi.org/10.1007/978-3-319-08587-6_32
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