Focusing the inverse method for linear logic

  • Authors:
  • Kaustuv Chaudhuri;Frank Pfenning

  • Affiliations:
  • Department of Computer Science, Carnegie Mellon University;Department of Computer Science, Carnegie Mellon University

  • Venue:
  • CSL'05 Proceedings of the 19th international conference on Computer Science Logic
  • Year:
  • 2005

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Abstract

Focusing is traditionally seen as a means of reducing inessential non-determinism in backward-reasoning strategies such as uniform proof-search or tableaux systems. In this paper we construct a form of focused derivations for propositional linear logic that is appropriate for forward reasoning in the inverse method. We show that the focused inverse method conservatively generalizes the classical hyperresolution strategy for Horn-theories, and demonstrate through a practical implementation that the focused inverse method is considerably faster than the non-focused version.