MPI-INF/SWS Research Reports 1991-2021

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Difference matching

Basin, David A. and Walsh, Toby

March 1992, 12 pages.

Status: available - back from printing

Difference matching is a generalization of first-order matching where terms are made identical both by variable instantiation and by structure hiding. After matching, the hidden structure may be removed by a type of controlled rewriting, called rippling, that leaves the rest of the term unaltered. Rippling has proved highly successful in inductive theorem proving. Difference matching allows us to use rippling in other contexts, e.g., equational, inequational, and propositional reasoning. We present a difference matching algorithm, its properties, several applications, and suggest extensions.

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  AUTHOR = {Basin, David A. and Walsh, Toby},
  TITLE = {Difference matching},
  TYPE = {Research Report},
  INSTITUTION = {Max-Planck-Institut f{\"u}r Informatik},
  ADDRESS = {Im Stadtwald, D-66123 Saarbr{\"u}cken, Germany},
  NUMBER = {MPI-I-92-211},
  MONTH = {March},
  YEAR = {1992},
  ISSN = {0946-011X},