Embedding pure type systems in the lambda-pi-calculus modulo

  • Authors:
  • Denis Cousineau;Gilles Dowek

  • Affiliations:
  • École polytechnique and INRIA, LIX, École polytechnique, Palaiseau Cedex, France;École polytechnique and INRIA, LIX, École polytechnique, Palaiseau Cedex, France

  • Venue:
  • TLCA'07 Proceedings of the 8th international conference on Typed lambda calculi and applications
  • Year:
  • 2007

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Abstract

The lambda-Pi-calculus allows to express proofs of minimal predicate logic. It can be extended, in a very simple way, by adding computation rules. This leads to the lambda-Pi-calculus modulo. We show in this paper that this simple extension is surprisingly expressive and, in particular, that all functional Pure Type Systems, such as the system F, or the Calculus of Constructions, can be embedded in it. And, moreover, that this embedding is conservative under termination hypothesis.