• Thumbnail for Wythoff symbol
    In geometry, the Wythoff symbol is a notation representing a Wythoff construction of a uniform polyhedron or plane tiling within a Schwarz triangle. It...
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  • grouped by the Wythoff symbol. All the faces are identical, each edge is identical and each vertex is identical. They all have a Wythoff symbol of the form...
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  • Thumbnail for Wythoff construction
    A vertex is placed at the point A. This produces a polyhedron with Wythoff symbol a|b c, where a equals π divided by the angle of the triangle at A, and...
    6 KB (551 words) - 18:30, 13 November 2023
  • figure. The nine forms, listed with their Wythoff symbols and vertex configurations are: Note that Wythoff's kaleidoscopic construction generates the nonorientable...
    14 KB (855 words) - 16:23, 7 June 2023
  • There are different notations for expressing these uniform solutions, Wythoff symbol, Coxeter diagram, and Coxeter's t-notation. Simple tiles are generated...
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  • Thumbnail for List of Euclidean uniform tilings
    sections. All reflectional forms can be made by Wythoff constructions, represented by Wythoff symbols, or Coxeter-Dynkin diagrams, each operating upon...
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  • triangular faces. Coxeter defines a quasiregular polyhedron as one having a Wythoff symbol in the form p | q r, and it is regular if q=2 or q=r. The Coxeter-Dynkin...
    30 KB (1,484 words) - 18:07, 31 December 2023
  • Thumbnail for Uniform polyhedron
    only its Wythoff symbol. The 57 nonprismatic nonconvex forms, with exception of the great dirhombicosidodecahedron, are compiled by Wythoff constructions...
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  • hexagon passing through the origin The Wythoff symbol relates the polyhedron to spherical triangles. Wythoff symbols are written p|q r, p q|r, p q r| where...
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  • Thumbnail for Willem Abraham Wythoff
    geometry, Wythoff is known for the Wythoff construction of uniform tilings and uniform polyhedra and for the Wythoff symbol used as a notation for these geometric...
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  • Thumbnail for Great dirhombicosidodecahedron
    polyhedron that cannot be made by the Wythoff construction from a spherical triangle. It has a special Wythoff symbol | 3⁄2 5⁄3 3 5⁄2, relating it to a spherical...
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  • Thumbnail for Trihexagonal tiling
    by the wallpaper group p6mm, (*632), and the tiling can be derived as a Wythoff construction within the reflectional fundamental domains of this group...
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  • domain mirrors meeting at 90 degrees generate no new mirrors). The Wythoff symbol takes the three integers and separates them by a vertical bar (|). If...
    44 KB (1,971 words) - 23:26, 3 May 2024
  • plane. With orbifold notation symmetry of *n32 all of these tilings are Wythoff constructions within a fundamental domain of symmetry, with generator points...
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  • Thumbnail for Great ditrigonal icosidodecahedron
    equivalent constructions, for example Wythoff symbol 3 | 3 5⁄4 gives Coxeter diagram = . It has extended Schläfli symbol a{5⁄2,3} or c{3,5⁄2}, as an altered...
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  • Thumbnail for Coxeter–Dynkin diagram
    honeycomb Convex uniform honeycombs in hyperbolic space Wythoff construction and Wythoff symbol Hall, Brian C. (2003), Lie Groups, Lie Algebras, and Representations:...
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  • Thumbnail for Hexagonal tiling
    colorings of a hexagonal tiling, all generated from reflective symmetry of Wythoff constructions. The (h,k) represent the periodic repeat of one colored tile...
    16 KB (1,286 words) - 23:15, 8 March 2024
  • Thumbnail for Square tiling
    square grid is a regular tiling of the Euclidean plane. It has Schläfli symbol of {4,4}, meaning it has 4 squares around every vertex. Conway called it...
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  • Thumbnail for Cubohemioctahedron
    vertices. Its vertex figure is a crossed quadrilateral. It is given Wythoff symbol 4⁄3 4 | 3, although that is a double-covering of this figure. A nonconvex...
    3 KB (299 words) - 22:42, 27 December 2022
  • Thumbnail for Rhombitrihexagonal tiling
    triangle, two squares, and one hexagon on each vertex. It has Schläfli symbol of rr{3,6}. John Conway calls it a rhombihexadeltille. It can be considered...
    12 KB (928 words) - 14:00, 8 March 2024
  • Thumbnail for Rhombicosidodecahedron
    notation eD or aaD Schläfli symbols rr{5,3} or r { 5 3 } {\displaystyle r{\begin{Bmatrix}5\\3\end{Bmatrix}}} t0,2{5,3} Wythoff symbol 3 5 | 2 Coxeter diagram...
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  • Thumbnail for Triangular tiling
    at a point occupy a full 360 degrees. The triangular tiling has Schläfli symbol of {3,6}. English mathematician John Conway called it a deltille, named...
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  • Thumbnail for Dodecadodecahedron
    spherical icosahedron used in construction of geodesic domes. It has four Wythoff constructions between four Schwarz triangle families: 2 | 5 5/2, 2 | 5...
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  • Thumbnail for Tetrahemihexahedron
    only non-prismatic uniform polyhedron with an odd number of faces. Its Wythoff symbol is 3/2 3 | 2, but that represents a double covering of the tetrahemihexahedron...
    6 KB (635 words) - 11:50, 15 July 2024
  • Thumbnail for Truncated hexagonal tiling
    triangles at the original vertex locations. It is given an extended Schläfli symbol of t{6,3}. Conway calls it a truncated hextille, constructed as a truncation...
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  • Thumbnail for Small ditrigonal icosidodecahedron
    Schläfli symbol a{5,3}, as an altered dodecahedron, and Coxeter diagram or . It is constructed from Schwarz triangle (3 3 5⁄2) with Wythoff symbol 3 | 5⁄2...
    3 KB (154 words) - 08:26, 19 January 2024
  • Thumbnail for Dihedron
    dihedron. A regular dihedron, with Schläfli symbol {n,2}, is made of two regular polygons, each with Schläfli symbol {n}. A spherical dihedron is made of two...
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  • Thumbnail for Uniform polytope
    The Wythoffian uniform polyhedra and tilings can be defined by their Wythoff symbol, which specifies the fundamental region of the object. An extension...
    53 KB (2,944 words) - 03:30, 24 July 2024
  • Thumbnail for List of uniform polyhedra by Schwarz triangle
    There are many relationships among the uniform polyhedra. The Wythoff construction is able to construct almost all of the uniform polyhedra from the acute...
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  • directly from their symmetry groups. They are listed for reference Wythoff's symbol for each of the Platonic solids. The tetrahedron, cube, and octahedron...
    53 KB (5,528 words) - 20:00, 25 July 2024