Parametric search made practical

  • Authors:
  • René van Oostrum;Remco C. Veltkamp

  • Affiliations:
  • Institute of Information & Computing Sciences, Utrecht University, PO Box 80.089, 3508 TB, Utrecht, The Netherlands;Institute of Information & Computing Sciences, Utrecht University, PO Box 80.089, 3508 TB, Utrecht, The Netherlands

  • Venue:
  • Computational Geometry: Theory and Applications - Special issue on the 18th annual symposium on computational geometry—SoCG2002
  • Year:
  • 2004

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Abstract

In this paper we show that in sorting-based applications of parametric search, Quicksort can replace the parallel sorting algorithms that are usually advocated. Because of the simplicity of Quicksort, this may lead to applications of parametric search that are not only efficient in theory, but in practice as well. Also, we argue that Cole's optimization of certain parametric-search algorithms may be unnecessary under realistic assumptions about the input. Furthermore, we present a generic, flexible, and easy-to-use framework that greatly simplifies the implementation of algorithms based on parametric search. We use our framework to implement an algorithm that solves the Fréchet-distance problem. The implementation based on parametric search is faster than the binary-search approach that is often suggested as a practical replacement for the parametric-search technique.