On the Proof Theory of Regular Fixed Points

  • Authors:
  • David Baelde

  • Affiliations:
  • INRIA & LIX / ÉÉÉcole Polytechnique,

  • Venue:
  • TABLEAUX '09 Proceedings of the 18th International Conference on Automated Reasoning with Analytic Tableaux and Related Methods
  • Year:
  • 2009

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Abstract

We consider encoding finite automata as least fixed points in a proof-theoretical framework equipped with a general induction scheme, and study automata inclusion in that setting. We provide a coinductive characterization of inclusion that yields a natural bridge to proof-theory. This leads us to generalize these observations to regular formulas , obtaining new insights about inductive theorem proving and cyclic proofs in particular.