Hellmuth Stachel
Vienna University of Technology – Institute of Discrete Mathematics and Geometry

 

ABSTRACT
The borderline between continuous flexibility and rigidity of structures like polyhedra or frameworks is not strict. There can be different levels of infinitesimal flexibility. This article presents the mathematical background and some examples of structures which under particular conditions are flexible or almost flexible and otherwise rigid.

KEY WORDS
rigidity, flexibility, infinitesimal flexibility, flexible polyhedra, snapping polyhedra, Kokotsakis Meshes, origami mechanisms

 

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SAJ Vol. 3, 2011, No. 2