Flexible polyhedra in Minkowski 3-space

  title={Flexible polyhedra in Minkowski 3-space},
  author={Victor Alexandrov},
  journal={manuscripta mathematica},
  • Victor Alexandrov
  • Published 2001
  • Mathematics
  • Abstract. We prove that (non-immersed) flexible polyhedra do exist in the Minkowski 3-space and each of them preserves the (generalized) volume and the (total) mean curvature during a flex. To prove the latter result, we introduce the notion of the angle between two arbitrary non-null nonzero vectors in the Minkowski plane. 

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