- Unistable polyhedron
An unistable polyhedron is stable on only one face . The simplest such
polyhedron known requires 19 faces and was discovered independently byRichard Guy andKen Knowlton around 1959.External links
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Unistable polyhedron
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Monostatic polytope — In geometry, a monostatic polytope (or unistable polyhedron) is a d polytope which can stand on only one face . They were described in 1969 by J.H. Conway, M. Goldberg and R.K. Guy. The monostatic polytope in 3 space they constructed has only 19… … Wikipedia
List of mathematics articles (U) — NOTOC U U duality U quadratic distribution U statistic UCT Mathematics Competition Ugly duckling theorem Ulam numbers Ulam spiral Ultraconnected space Ultrafilter Ultrafinitism Ultrahyperbolic wave equation Ultralimit Ultrametric space… … Wikipedia
Richard K. Guy — Richard Kenneth Guy (born 1916, Nuneaton, Warwickshire) is a British mathematician, Professor Emeritus in the Department of Mathematics at the University of Calgary.He is best known for co authorship (with John Conway and Elwyn Berlekamp) of… … Wikipedia
