• Thumbnail for Orbifold
    me. It was obtained by a democratic process in my course of 1976–77. An orbifold is something with many folds; unfortunately, the word "manifold" already...
    78 KB (10,264 words) - 13:57, 16 May 2024
  • In geometry, orbifold notation (or orbifold signature) is a system, invented by the mathematician William Thurston and promoted by John Conway, for representing...
    19 KB (1,194 words) - 20:05, 28 January 2024
  • Coxeter group [7,3], orbifold (*732) contains these uniform tilings: The (8 3 2) triangle group, Coxeter group [8,3], orbifold (*832) contains these...
    30 KB (1,586 words) - 18:07, 31 December 2023
  • S 1 {\displaystyle S^{1}} -bundle (circle bundle) over a 2-dimensional orbifold. Many 3-manifolds are Seifert fiber spaces, and they account for all compact...
    19 KB (3,040 words) - 11:33, 7 November 2023
  • Thumbnail for Wallpaper group
    orbifold, but fractions, rather than whole numbers. Because the orbifold itself is a quotient of the full surface by the symmetry group, the orbifold...
    75 KB (7,708 words) - 03:19, 21 May 2024
  • In differential geometry, the Euler characteristic of an orbifold, or orbifold Euler characteristic, is a generalization of the topological Euler characteristic...
    3 KB (370 words) - 02:49, 18 May 2024
  • Thumbnail for Tetragonal crystal system
    their representations in international notation, Schoenflies notation, orbifold notation, Coxeter notation and mineral examples. There is only one tetragonal...
    5 KB (191 words) - 07:14, 13 May 2024
  • Thumbnail for Triclinic crystal system
    point groups, International Tables for Crystallography space group number, orbifold, type, and space groups are listed in the table below. There are a total...
    3 KB (262 words) - 20:08, 9 May 2024
  • Thumbnail for William Thurston
    respectively. In his work on hyperbolic Dehn surgery, Thurston realized that orbifold structures naturally arose. Such structures had been studied prior to Thurston...
    22 KB (2,137 words) - 10:00, 7 April 2024
  • Stacky curve (redirect from Orbifold curve)
    Stacky curves are closely related to 1-dimensional orbifolds and therefore sometimes called orbifold curves or orbicurves. A stacky curve X {\displaystyle...
    5 KB (497 words) - 03:00, 1 March 2024
  • Thumbnail for Monoclinic crystal system
    group in Schoenflies notation, Hermann–Mauguin (international) notation, orbifold notation, and Coxeter notation, type descriptors, mineral examples, and...
    6 KB (480 words) - 14:42, 12 December 2023
  • manifolds comes from orbifolds (see Euler characteristic of an orbifold). While every manifold has an integer Euler characteristic, an orbifold can have a fractional...
    29 KB (3,445 words) - 21:27, 7 March 2024
  • symmetry whose axis passes through the center of rotational symmetry. In the orbifold corresponding to the subgroup, a gyration corresponds to a rotation point...
    2 KB (170 words) - 22:58, 12 May 2024
  • notion of orbifold, proposed by Augusto Sagnotti in 1987. The novelty is that in the case of string theory the non-trivial element(s) of the orbifold group...
    8 KB (1,169 words) - 12:32, 5 November 2023
  • point groups, International Tables for Crystallography space group number, orbifold notation, type, and space groups are listed in the table below. In two...
    6 KB (326 words) - 22:54, 17 January 2024
  • Toric stack (redirect from Toric orbifold)
    Consequently, a toric variety is a coarse approximation of a toric stack. A toric orbifold is an example of a toric stack. Stanley–Reisner ring Iwanari, Isamu (2009)...
    1 KB (152 words) - 10:36, 13 July 2020
  • Thumbnail for Space group
    arrangement (motif)). Orbifold notation (2D) Fibrifold notation (3D) As the name suggests, the orbifold notation describes the orbifold, given by the quotient...
    55 KB (4,225 words) - 16:10, 20 March 2024
  • Thumbnail for Uniform tiling symmetry mutations
    fundamental domains between two symmetry groups. They are compactly expressed in orbifold notation. These mutations can occur from spherical tilings to Euclidean...
    5 KB (157 words) - 21:56, 12 December 2023
  • Thumbnail for Black hole
    manifold K3 surface G2 manifold Spin(7)-manifold Generalized complex manifold Orbifold Conifold Orientifold Moduli space Hořava–Witten theory K-theory (physics)...
    166 KB (18,798 words) - 00:16, 19 May 2024
  • Thumbnail for Lambert quadrilateral
    Lambert quadrilateral fundamental domain in orbifold *p222 *3222 symmetry with 60 degree angle on one of its corners. *4222 symmetry with 45 degree angle...
    4 KB (584 words) - 23:41, 29 January 2023
  • groups are named here by three naming schemes: International notation, orbifold notation, and Coxeter notation. There are three kinds of symmetry groups...
    16 KB (450 words) - 08:43, 28 May 2022
  • Thumbnail for Oblique lattice
    oblique lattice class names, Schönflies notation, Hermann-Mauguin notation, orbifold notation, Coxeter notation, and wallpaper groups are listed in the table...
    2 KB (85 words) - 16:58, 27 September 2022
  • Thumbnail for Hexagonal lattice
    hexagonal lattice class names, Schönflies notation, Hermann-Mauguin notation, orbifold notation, Coxeter notation, and wallpaper groups are listed in the table...
    5 KB (224 words) - 07:00, 4 February 2024
  • Thumbnail for Octahedron
    the sphere to the Euclidean plane and into the hyperbolic plane. With orbifold notation symmetry of *n32 all of these tilings are Wythoff constructions...
    26 KB (2,748 words) - 01:59, 14 March 2024
  • Thumbnail for Square lattice
    symmetry group in IUC notation as p4m, Coxeter notation as [4,4], and orbifold notation as *442. Two orientations of an image of the lattice are by far...
    7 KB (552 words) - 07:20, 4 February 2024
  • inverse ratio to the degrees of the correspondence. An orbifold covering of degree N between orbifold surfaces S' and S is a branched covering, so the Riemann–Hurwitz...
    7 KB (1,039 words) - 07:13, 29 February 2024
  • Thumbnail for Torus
    space of unordered, not necessarily distinct points is accordingly the orbifold T n / S n {\displaystyle \mathbb {T} ^{n}/\mathbb {S} _{n}} , which is...
    37 KB (4,970 words) - 05:59, 29 March 2024
  • Thumbnail for Trihexagonal tiling
    the sphere to the Euclidean plane and into the hyperbolic plane. With orbifold notation symmetry of *n32 all of these tilings are wythoff construction...
    16 KB (1,622 words) - 15:28, 8 March 2024
  • This article lists the groups by Schoenflies notation, Coxeter notation, orbifold notation, and order. John Conway uses a variation of the Schoenflies notation...
    19 KB (548 words) - 10:00, 24 February 2024
  • Thumbnail for Cubic crystal system
    names, point groups (in Schönflies notation, Hermann–Mauguin notation, orbifold, and Coxeter notation), type, examples, international tables for crystallography...
    49 KB (3,620 words) - 05:36, 18 April 2024