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Jessen's icosahedron
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Jessen's icosahedron, sometimes called Jessen's orthogonal icosahedron, is a non-convex polyhedron with the same numbers of vertices, edges, and faces as the regular icosahedron. It is named for Børge
Het Ding [nl], a tensegrity sculpture whose struts and cables form the outline of Jessen's icosahedron, at the University of Twente
Het Ding [nl], a tensegrity sculpture whose struts and cables form the outline of Jessen's icosahedron, at the University of Twente
Børge Jessen
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Børge Christian Jessen was a Danish mathematician best known for his work in analysis, specifically on the Riemann zeta function, and in geometry, specifically on Hilbert's third problem.
Jessen's icosahedron
…orthogonal icosahedron, is a non-convex polyhedron with the same numbers of vertices, edges, and faces as the regular icosahedron. It is named for Børge Jessen, who studied it in 1967. In 1971, a family of nonconvex polyhedra including this shape was independently discovered and studied by Adrien Douady under…
Jessen (right) with Werner Fenchel, A.D. Alexandrov and Herbert Busemann in 1954
Jessen (right) with Werner Fenchel, A.D. Alexandrov and Herbert Busemann in 1954