On the stabbing number of a random Delaunay triangulation

  • Authors:
  • Prosenjit Bose;Luc Devroye

  • Affiliations:
  • School of Computer Science, Carleton University, Herzberg Room 5372, 1125 Colonel By Drive, Ottawa, Canada K1S 5B6;School of Computer Science, McGill University, 3480 University Street, Montreal, Canada H3A 2K6

  • Venue:
  • Computational Geometry: Theory and Applications
  • Year:
  • 2007

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Abstract

We consider a Delaunay triangulation defined on n points distributed independently and uniformly on a planar compact convex set of positive volume. Let the stabbing number be the maximal number of intersections between a line and edges of the triangulation. We show that the stabbing number S"n is @Q(n) in the mean, and provide tail bounds for P{S"n=tn}. Applications to planar point location, nearest neighbor searching, range queries, planar separator determination, approximate shortest paths, and the diameter of the Delaunay triangulation are discussed.