The Anatomy of Innocence

  • Authors:
  • Vincent Danos;Russell Harmer

  • Affiliations:
  • -;-

  • Venue:
  • CSL '01 Proceedings of the 15th International Workshop on Computer Science Logic
  • Year:
  • 2001

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Abstract

We reveal a symmetric structure in the ho/n games model of innocent strategies, introducing rigid strategies, a concept dual to bracketed strategies. We prove a direct definability theorem of general innocent strategies with respect to a simply typed language of extended Böhm trees, which gives an operational meaning to rigidity in call-byname. A corresponding factorization of innocent strategies into rigid ones with some form of conditional as an oracle is constructed.