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Steffen's Flexible Polyhedron
Автор: Wolfram Demonstrations Project
Загружено: 2012-01-25
Просмотров: 1365
Описание:
http://demonstrations.wolfram.com/Ste...
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
Steffen's polyhedron is able to flex without self-intersection and without distorting any of its faces. It has 14 triangular faces, 21 edges, and 9 vertices. Euler had conjectured no polyhedron could flex. Cauchy proved that convex polyhedra cannot flex...
Contributed by: Mark McClure With additional contribution by Izidor Hafner.
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