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Based Revision Operations and Schemes: Semantics, Representation, and Complexity

  • B. Nebel
Conference paper
Part of the International Centre for Mechanical Sciences book series (CISM, volume 363)

Abstract

The theory of belief revision developed by Gärdenfors and his colleagues characterizes the classes of reasonable belief revision operations. However, some of the assumptions made in the theory of belief revision are unrealistic from a computational point of view. We address this problem by considering revision operations 1 hat are based on a priority ordering over a set of sentences representing a belief state instead of using preference relations over all sentences that are accepted in a belief state. In addition to providing a semantic justification for such operations, we investigate also the computational complexity. We show how to generate an epistemic entrenchment ordering for a belief state from an arbitrary priority ordering over a set of sentences representing the belief state and show that the resulting revision is very efficient. Finally. we show t hat some schemes for generating revision operations From bases can encode the preference relations more concisely than others.

Keywords

Revision Operation Belief Revision Belief State Belief Base Priority Class 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 1995

Authors and Affiliations

  • B. Nebel
    • 1
  1. 1.University of UlmUlmGermany

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