Games, Automata and Matching

  • Authors:
  • Colin Stirling

  • Affiliations:
  • School of Informatics, University of Edinburgh,

  • Venue:
  • CADE-21 Proceedings of the 21st international conference on Automated Deduction: Automated Deduction
  • Year:
  • 2007

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Abstract

Higher-order matching is the problem given t= uwhere t, uare terms of simply typed 茂戮驴-calculus and uis closed, is there a substitution 茂戮驴such that t茂戮驴and uhave the same normal form with respect to β茂戮驴-equality: can tbe pattern matched to u? The problem was conjectured to be decidable by Huet [4]. Loader showed that it is undecidable when β-equality is the same normal form by encoding 茂戮驴-definability as matching [6].