Model representation via contexts and implicit generalizations

  • Authors:
  • Christian G. Fermüller;Reinhard Pichler

  • Affiliations:
  • Technische Universität Wien, Vienna, Austria;Technische Universität Wien, Vienna, Austria

  • Venue:
  • CADE' 20 Proceedings of the 20th international conference on Automated Deduction
  • Year:
  • 2005

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Abstract

Some results on expressibility and complexity issues in model representation are presented. In particular, the relation between so-called ‘contexts' as recently introduced in [4] for the model evolution calculus and the more traditional ‘disjunctions of implicit generalizations' (DIGs) [21] is clarified: contexts are as expressible as DIGs, but DIGs may represent the same model exponentially more succinctly. The clause evaluation problem and the equivalence problem for DIGs and contexts, respectively, are all shown to be coNP-complete.