Triangulations without Minimum-Weight Drawing

  • Authors:
  • Cao An Wang;Francis Y. L. Chin;Bo-Ting Yang

  • Affiliations:
  • -;-;-

  • Venue:
  • CIAC '00 Proceedings of the 4th Italian Conference on Algorithms and Complexity
  • Year:
  • 2000

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Abstract

It is known that some triangulation graphs admit straight-line drawings realizing certain characteristics, e.g., greedy triangulation, minimumweight triangulation, Delaunay triangulation, etc.. Lenhart and Liotta [12] in their pioneering paper on "drawable" minimum-weight triangulations raised an open problem: 'Does every triangulation graph whose skeleton is a forest admit a minimum-weight drawing?' In this paper, we answer this problem by disproving it in the general case and even when the skeleton is restricted to a tree or, in particular, a star.