Minimum weight pseudo-triangulations

  • Authors:
  • Joachim Gudmundsson;Christos Levcopoulos

  • Affiliations:
  • National ICT Australia Ltd, Sydney, Australia11National ICT Australia Ltd. is funded through the Australian Government's Backing Australia's Ability initiative, in part through the Australian Rese ...;Department of Computer Science, Lund University, Lund, Sweden

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

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Abstract

We consider the problem of computing a minimum weight pseudo-triangulation of a set of n points in the plane. We first present an -time algorithm that produces a pseudo-triangulation of weight which is shown to be asymptotically worst-case optimal, i.e., there exists a point set for which every pseudo-triangulation has weight , where is the weight of a minimum weight spanning tree of . We also present a constant factor approximation algorithm running in cubic time. In the process we give an algorithm that produces a minimum weight pseudo-triangulation of a simple polygon.