Analytic tableaux calculi for KLM logics of nonmonotonic reasoning

Author:

Giordano Laura1,Gliozzi Valentina2,Olivetti Nicola3,Pozzato Gian Luca2

Affiliation:

1. Università del Piemonte Orientale “A. Avogadro”, Alessandria, Italy

2. Università degli Studi di Torino, Turin, Italy

3. Université Paul Cézanne, Marseille, France

Abstract

We present tableau calculi for the logics of nonmonotonic reasoning defined by Kraus, Lehmann and Magidor (KLM). We give a tableau proof procedure for all KLM logics, namely preferential, loop-cumulative, cumulative, and rational logics. Our calculi are obtained by introducing suitable modalities to interpret conditional assertions. We provide a decision procedure for the logics considered and we study their complexity.

Publisher

Association for Computing Machinery (ACM)

Subject

Computational Mathematics,Logic,General Computer Science,Theoretical Computer Science

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