On the algebraic foundation of proof assistants for intuitionistic type theory

  • Authors:
  • Andreas Abel;Thierry Coquand;Peter Dybjer

  • Affiliations:
  • Institut für Informatik, Ludwig-Maximilians-Universität, München;Department of Computer Science, Chalmers University of Technology, Göteborg;Department of Computer Science, Chalmers University of Technology, Göteborg

  • Venue:
  • FLOPS'08 Proceedings of the 9th international conference on Functional and logic programming
  • Year:
  • 2008

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Abstract

An algebraic presentation of Martin-Löf's intuitionistic type theory is given which is based on the notion of a category with families with extra structure. We then present a type-checking algorithm for the normal forms of this theory, and sketch how it gives rise to an initial category with families with extra structure. In this way we obtain a purely algebraic formulation of the correctness of the type-checking algorithm which provides the core of proof assistants for intuitionistic type theory.