On the structure of run-maximal strings

  • Authors:
  • Andrew Baker;Antoine Deza;Frantisek Franek

  • Affiliations:
  • Advanced Optimization Laboratory, Department of Computing and Software, McMaster University, Hamilton, Ontario, Canada;Advanced Optimization Laboratory, Department of Computing and Software, McMaster University, Hamilton, Ontario, Canada;Advanced Optimization Laboratory, Department of Computing and Software, McMaster University, Hamilton, Ontario, Canada

  • Venue:
  • Journal of Discrete Algorithms
  • Year:
  • 2012

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Abstract

We present a combinatorial structure consisting of a special cover of a string by squares. We characterize the covering property of run-maximal strings, i.e. strings achieving the maximal number of runs. The covering property leads to a compression scheme which is particularly efficient for run-maximal strings. It also yields a significant speed improvement in the computer search for good run-maximal string candidates. The implementation of the search and preliminary computational results are discussed.