New upper bounds for selection

  • Authors:
  • Chee K. Yap

  • Affiliations:
  • Yale Univ., New Haven, CT

  • Venue:
  • Communications of the ACM
  • Year:
  • 1976

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Abstract

The worst-case, minimum number of comparisons complexity Vi(n) of the i-th selection problem is considered. A new upper bound for Vi(n) improves the bound given by the standard Hadian-Sobel algorithm by a generalization of the Kirkpatrick-Hadian-Sobel algorithm, and extends Kirkpatrick's method to a much wider range of application. This generalization compares favorably with a recent algorithm by Hyafil.