On Explicit Substitution with Names

  • Authors:
  • Kristoffer H. Rose;Roel Bloo;Frédéric Lang

  • Affiliations:
  • IBM Thomas J. Watson Research Center, Yorktown Heights, USA 10598;Eindhoven University of Technology, Eindhoven, The Netherlands 5600 MB;INRIA Grenoble Rhône-Alpes/LIG, Saint-Ismier Cedex, France 38334

  • Venue:
  • Journal of Automated Reasoning
  • Year:
  • 2012

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Abstract

This paper recounts the origins of the 驴x family of calculi of explicit substitution with proper variable names, including the original result of preservation of strong β-normalization based on the use of synthetic reductions for garbage collection. We then discuss the properties of a variant of the calculus which is also confluent for "open" terms (with meta-variables), and verify that a version with garbage collection preserves strong β-normalization (as is the state of the art), and we summarize the relationship with other efforts on using names and garbage collection rules in explicit substitution.