On the development of the intersection of a plane with a polytope

  • Authors:
  • Joseph O'Rourke

  • Affiliations:
  • Department Computer Science, Smith College, Northampton, MA

  • Venue:
  • Computational Geometry: Theory and Applications - Special issue on Discrete and computational geometry
  • Year:
  • 2003

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Abstract

Define a "slice" curve as the intersection of a plane with the surface of a polytope, i.e., a convex polyhedron in three dimensions. We prove that a slice curve develops on a plane without self-intersection. The key tool used is a generalization of Cauchy's arm lemma to permit nonconvex "openings" of a planar convex chain.