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・ Pseudo-reductive group
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Pseudo-uniform polyhedron
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Pseudo-uniform polyhedron : ウィキペディア英語版
Pseudo-uniform polyhedron
A pseudo-uniform polyhedron is a polyhedron which has regular polygons as faces and has the same vertex configuration at all vertices but is not vertex-transitive: it is not true that for any two vertices, there exists a symmetry of the polyhedron mapping the first isometrically onto the second. Thus, although all the vertices of a pseudo-uniform polyhedron appear the same, it is not isogonal. They are called pseudo-uniform polyhedra due to their resemblance to some true uniform polyhedra.
There are only two pseudo-uniform polyhedra: the pseudorhombicuboctahedron and the pseudo-great rhombicuboctahedron.〔. Reprinted in .〕 They both have D4d symmetry, the same symmetry as a square antiprism. They can both be constructed from a uniform polyhedron by twisting one cupola-shaped cap.
==The pseudo-uniform polyhedra==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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