Примеры использования Uniform polyhedra на Английском языке и их переводы на Русский язык
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There are many relationships among the uniform polyhedra.
These two uniform polyhedra cannot be generated at all by the Wythoff construction.
The octahedron is one of a family of uniform polyhedra related to the cube.
For uniform polyhedra, the angle defect can be used to compute the number of vertices.
This was the first time that all of the uniform polyhedra had been made as paper models.
For uniform polyhedra the Dorman Luke construction cuts each connected edge at its midpoint.
The cuboctahedron is one of a family of uniform polyhedra related to the cube and regular octahedron.
Like the uniform polyhedra there are eight uniform tilings that can be based from the regular square tiling.
Wythoff symbol- a symbol for the Wythoff construction of uniform polyhedra and uniform tilings.
Three mirrors can generate uniform polyhedra; including rational numbers gives the set of Schwarz triangles.
There also exist octahedral Schwarz triangles which use 4/2 as a number, butthese only lead to degenerate uniform polyhedra as 4 and 2 have a common factor.
Geometrically distorted variations of uniform polyhedra and tilings can also be given the vertex configuration.
For uniform polyhedra there is only one vertex type and therefore the vertex configuration fully defines the polyhedron. .
Can also be used, but only leads to degenerate uniform polyhedra as 4 and 2 have a common factor.
Other nonregular uniform polyhedra are listed with their vertex configuration or their Uniform polyhedron index U1-80.
A 4-polytope is uniform if it has a symmetry group under which all vertices are equivalent, andits cells are uniform polyhedra.
It was proven in 1970 that there are only 75 uniform polyhedra other than the infinite families of prisms and antiprisms.
Since uniform polyhedra have all identical vertices, this relation allows us to compute the number of vertices, which is 4π/defect or 720/defect.
A uniform tiling of 3-space is one whose vertices are congruent and related by a space group andwhose cells are uniform polyhedra.
Like the uniform polyhedra there are eight uniform tilings that can be based from the regular hexagonal tiling or the dual triangular tiling.
The flemish bond follow the same topology with octagons flatted into rectangles:The truncated square tiling is topologically related as a part of sequence of uniform polyhedra and tilings with vertex figures 4.2n.2n, extending into the hyperbolic plane: The 3-dimensional bitruncated cubic honeycomb projected into the plane shows two copies of a truncated tiling.
There are 7 convex uniform polyhedra that can be constructed from this symmetry group and 3 from its alternation subsymmetries, each with a uniquely marked up Coxeter-Dynkin diagram.
In 1976 John Skilling published Uniform Compounds of Uniform Polyhedra which enumerated 75 compounds(including 6 as infinite prismatic sets of compounds, 20- 25) made from uniform polyhedra with rotational symmetry.
Many degenerate uniform polyhedra, with completely coincident vertices, edges, or faces, may also be generated by the Wythoff construction, and those that arise from Schwarz triangles not using 4/2 are also given in the tables below along with their non-degenerate counterparts.
Paper models of Archimedean Solids andCatalan Solids Free paper models(nets) of Archimedean solids The Uniform Polyhedra by Dr. R. Mäder Virtual Reality Polyhedra, The Encyclopedia of Polyhedra by George W. Hart Penultimate Modular Origami by James S. Plank Interactive 3D polyhedra in Java Solid Body Viewer is an interactive 3D polyhedron viewer which allows you to save the model in svg, stl or obj format.
Not included are: 40 potential uniform polyhedra with degenerate vertex figures which have overlapping edges(not counted by Coxeter); The uniform tilings(infinite polyhedra) 11 Euclidean uniform tessellations with convex faces; 14 Euclidean uniform tilings with nonconvex faces; Infinite number of uniform tilings in hyperbolic plane.
It is the only non-prismatic uniform polyhedron with an odd number of faces.
Uniform polyhedron Prism(geometry) Antiprism Coxeter, Harold Scott MacDonald; Longuet-Higgins, M. S.; Miller, J. C. P. 1954.
If all its faces are regular,it is a semiregular polyhedron or uniform polyhedron.
It has the same vertex figure as the nonconvex great rhombicuboctahedron(a uniform polyhedron) but is not a uniform polyhedron and has a smaller symmetry group.