Parallel reductions in λ-calculus

  • Authors:
  • Masako Takahashi

  • Affiliations:
  • Department of Information Science, Tokyo Institute of Technology, Ookayama, Meguro, Tokyo 152 Japan

  • Venue:
  • Journal of Symbolic Computation
  • Year:
  • 1989

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Abstract

The notion of parallel reduction is extracted from the Tait-Martin-Lof proof of the Church-Rosser theorem (for @b-reduction). We define parallel @b-, @h- and @b@h-reduction by induction, and use them to give simple proofs of some fundamental theorems in @l-calculus; the normal reduction theorem for @b-reduction, that for @b@h-reduction, the postponement theorem of @h-reduction (in @b@h-reduction), and some others.