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COXETER ELEMENT

  • Coxeter element
  • Concept in geometry

    In mathematics, a Coxeter element is an element of an irreducible Coxeter group which is a product of all simple reflections. The product depends on the

    Coxeter element

    Coxeter_element

  • Coxeter group
  • Group that admits a formal description in terms of reflections

    In mathematics, a Coxeter group, named after H. S. M. Coxeter, is an abstract group that admits a formal description in terms of reflections (or kaleidoscopic

    Coxeter group

    Coxeter_group

  • Longest element of a Coxeter group
  • Unique element of maximal length in a finite Coxeter group

    In mathematics, the longest element of a Coxeter group is the unique element of maximal length in a finite Coxeter group with respect to the chosen generating

    Longest element of a Coxeter group

    Longest_element_of_a_Coxeter_group

  • Harold Scott MacDonald Coxeter
  • Canadian geometer (1907–2003)

    the Coxeter graph, Coxeter groups, Coxeter's loxodromic sequence of tangent circles, Coxeter–Dynkin diagrams, and the Todd–Coxeter algorithm. Coxeter was

    Harold Scott MacDonald Coxeter

    Harold Scott MacDonald Coxeter

    Harold_Scott_MacDonald_Coxeter

  • Hyperoctahedral group
  • Group of symmetries of an n-dimensional hypercube

    any finite Coxeter group that contains −1, one has for any Coxeter element that c h / 2 = − 1 {\displaystyle c^{h/2}=-1} , where the Coxeter number h is

    Hyperoctahedral group

    Hyperoctahedral group

    Hyperoctahedral_group

  • Tesseract
  • Four-dimensional analogue of the cube

    measure polytope, taken as a unit for hypervolume. Harold Scott MacDonald Coxeter labels it the γ4 polytope. The term hypercube without a dimension reference

    Tesseract

    Tesseract

    Tesseract

  • Affine symmetric group
  • Number line and triangular tiling's symmetry mathematical structure

    Coxeter element s 0 ⋅ s 1 ⋯ s n − 1 {\displaystyle s_{0}\cdot s_{1}\cdots s_{n-1}} in S ~ n {\displaystyle {\widetilde {S}}_{n}} is a Coxeter element

    Affine symmetric group

    Affine symmetric group

    Affine_symmetric_group

  • Coxeter–Dynkin diagram
  • Pictorial representation of symmetry

    a Coxeter–Dynkin diagram (or Coxeter diagram, Coxeter graph) is a graph with numerically labeled edges (called branches) representing a Coxeter group

    Coxeter–Dynkin diagram

    Coxeter–Dynkin diagram

    Coxeter–Dynkin_diagram

  • 5
  • Natural number

    hyperbolic Coxeter groups, or 4-prisms, of rank 5, each generating uniform honeycombs in hyperbolic 4-space as permutations of rings of the Coxeter diagrams

    5

    5

  • Coxeter matroid
  • Group-theoretic generalization of matroids

    generated by some subset of S). A Coxeter matroid is a subset M of W/P that for every w in W, M contains a unique minimal element with respect to the w-Bruhat

    Coxeter matroid

    Coxeter_matroid

  • Coxeter complex
  • Simplicial complex

    mathematics, the Coxeter complex, named after H. S. M. Coxeter, is a geometrical structure (a simplicial complex) associated to a Coxeter group. Coxeter complexes

    Coxeter complex

    Coxeter_complex

  • Weyl group
  • Subgroup of a root system's isometry group

    corresponds to the identity element of the Weyl group, and the dual top-dimensional cell corresponds to the longest element of a Coxeter group. There are a number

    Weyl group

    Weyl group

    Weyl_group

  • 5-cube
  • 5-dimensional hypercube

    5-cube or 5-orthoplex. Coxeter, Regular Polytopes, sec 1.8 Configurations Coxeter (1991), p. 117. H.S.M. Coxeter: H.S.M. Coxeter, Regular Polytopes, 1973

    5-cube

    5-cube

  • 5-cell
  • Four-dimensional analogue of the tetrahedron

    pentachoron, pentatope, pentahedroid, tetrahedral pyramid, or 4-simplex (Coxeter's α4 polytope), the simplest possible convex 4-polytope, and is analogous

    5-cell

    5-cell

    5-cell

  • Parabolic subgroup of a reflection group
  • Mathematical group

    element of W) and W S = W {\displaystyle W_{S}=W} . The pair ( W I , I ) {\displaystyle (W_{I},I)} is again a Coxeter system. Moreover, the Coxeter group

    Parabolic subgroup of a reflection group

    Parabolic_subgroup_of_a_reflection_group

  • Coxeter notation
  • Classification system for symmetry groups in geometry

    Coxeter notation (also Coxeter symbol) is a system of classifying symmetry groups, describing the angles between fundamental reflections of a Coxeter

    Coxeter notation

    Coxeter notation

    Coxeter_notation

  • 7-cube
  • 7-dimensional hypercube

    6-simplex 6-faces. Coxeter, Regular Polytopes, p. 12, Sec. 1.8 Configurations Coxeter (1991), p. 117. H.S.M. Coxeter: H.S.M. Coxeter, Regular Polytopes

    7-cube

    7-cube

    7-cube

  • Iwahori–Hecke algebra
  • Deformation of the group algebra of a Coxeter group

    of the group algebra of a Coxeter group. The Hecke algebra can also be viewed as a q-analog of the group algebra of a Coxeter group. Hecke algebras are

    Iwahori–Hecke algebra

    Iwahori–Hecke_algebra

  • Complexification (Lie group)
  • Universal construction of a complex Lie group from a real Lie group

    BσB is determined by the length of σ as an element of W. The dimension is maximized at the Coxeter element and gives the unique open dense double coset

    Complexification (Lie group)

    Complexification (Lie group)

    Complexification_(Lie_group)

  • Matsumoto's theorem (group theory)
  • two reduced words of a Coxeter group to represent the same element. Sometimes, this is also called Matsumoto's lemma. A Coxeter group is a group that admits

    Matsumoto's theorem (group theory)

    Matsumoto's_theorem_(group_theory)

  • Todd–Coxeter algorithm
  • Algorithm for solving the coset enumeration problem

    In group theory, the Todd–Coxeter algorithm, created by J. A. Todd and H. S. M. Coxeter in 1936, is an algorithm for solving the coset enumeration problem

    Todd–Coxeter algorithm

    Todd–Coxeter_algorithm

  • Point group
  • Group of geometric symmetries with at least one fixed point

    n Coxeter group has n mirrors and is represented by a Coxeter–Dynkin diagram. Coxeter notation offers a bracketed notation equivalent to the Coxeter diagram

    Point group

    Point group

    Point_group

  • Pentellated 6-simplexes
  • Uniform 6-polytope

    gotaf). H.S.M. Coxeter: H.S.M. Coxeter, Regular Polytopes, 3rd edition, Dover, New York, 1973 Kaleidoscopes: Selected Writings of H.S.M. Coxeter, edited by

    Pentellated 6-simplexes

    Pentellated 6-simplexes

    Pentellated_6-simplexes

  • Regular 4-polytope
  • Four-dimensional analogues of the regular polyhedra in three dimensions

    Coxeter 1973, § 1.8 Configurations Coxeter, Complex Regular Polytopes, p. 117 Conway, Burgiel & Goodman-Strauss 2008, p. 406, Fig 26.2 Coxeter, Star

    Regular 4-polytope

    Regular 4-polytope

    Regular_4-polytope

  • 8-orthoplex
  • Convex regular 8-polytope

    "x3o3o3o3o3o3o4o - ek". Coxeter, Regular Polytopes, sec 1.8 Configurations Coxeter (1991), p. 117. H.S.M. Coxeter: H.S.M. Coxeter, Regular Polytopes, 3rd

    8-orthoplex

    8-orthoplex

    8-orthoplex

  • 1 42 polytope
  • Uniform 8 dimensional polytope

    constructed within the symmetry of the E8 group. Its Coxeter symbol is 142, describing its bifurcating Coxeter-Dynkin diagram, with a single ring on the end

    1 42 polytope

    1 42 polytope

    1_42_polytope

  • 5-orthoplex
  • Convex regular 5-polytope in geometry

    alternately labeled (checkerboarded) facets, with Schläfli symbol {3,3,31,1} or Coxeter symbol 211. It is a part of an infinite family of polytopes, called cross-polytopes

    5-orthoplex

    5-orthoplex

    5-orthoplex

  • 6-demicube
  • Uniform 6-polytope

    as HM6 for a 6-dimensional half measure polytope. Coxeter named this polytope as 131 from its Coxeter diagram, with a ring on one of the 1-length branches

    6-demicube

    6-demicube

    6-demicube

  • 5-demicube
  • Regular 5-polytope

    as HM5 for a 5-dimensional half measure polytope. Coxeter named this polytope as 121 from its Coxeter diagram, which has branches of length 2, 1 and 1

    5-demicube

    5-demicube

    5-demicube

  • 1 32 polytope
  • Uniform polytope

    polytope, constructed from the E7 group. Its Coxeter symbol is 132, describing its bifurcating Coxeter-Dynkin diagram, with a single ring on the end

    1 32 polytope

    1 32 polytope

    1_32_polytope

  • 7-orthoplex
  • Regular 7- polytope

    (x3o3o3o3o3o4o - zee). Coxeter, Regular Polytopes, sec 1.8 Configurations Coxeter (1991), p. 117. H.S.M. Coxeter: H.S.M. Coxeter, Regular Polytopes, 3rd

    7-orthoplex

    7-orthoplex

    7-orthoplex

  • Dynkin diagram
  • Pictorial representation of symmetry

    unoriented diagram (a special kind of Coxeter diagram), the Weyl group (a concrete reflection group), or the abstract Coxeter group. Although the Weyl group

    Dynkin diagram

    Dynkin diagram

    Dynkin_diagram

  • Plancherel theorem for spherical functions
  • Representation theory

    where B = MAN and the union is disjoint. Taking the Coxeter element s0 of W, the unique element mapping a + {\displaystyle {\mathfrak {a}}_{+}} onto

    Plancherel theorem for spherical functions

    Plancherel_theorem_for_spherical_functions

  • Uniform 10-polytope
  • Type of geometrical object

    symmetry can be generated by these three Coxeter groups, represented by permutations of rings of the Coxeter-Dynkin diagrams: Selected regular and uniform

    Uniform 10-polytope

    Uniform 10-polytope

    Uniform_10-polytope

  • 4 21 polytope
  • Polytope in 8-dimensional geometry

    He called it an 8-ic semi-regular figure. Its Coxeter symbol is 421, describing its bifurcating Coxeter-Dynkin diagram, with a single ring on the end

    4 21 polytope

    4 21 polytope

    4_21_polytope

  • Uniform 4-polytope
  • Class of 4-dimensional polytopes

    Honeycombs under advisor Coxeter, completes the basic theory of uniform polytopes for dimensions 4 and higher. 1986 Coxeter published a paper Regular

    Uniform 4-polytope

    Uniform 4-polytope

    Uniform_4-polytope

  • Goldberg–Coxeter construction
  • Graph operation

    The Goldberg–Coxeter construction or Goldberg–Coxeter operation (GC construction or GC operation) is a graph operation defined on regular polyhedral graphs

    Goldberg–Coxeter construction

    Goldberg–Coxeter construction

    Goldberg–Coxeter_construction

  • Garside element
  • Element of algebraic structure

    element is an element of an algebraic structure such as a monoid that has several desirable properties. Formally, if M is a monoid, then an element Δ

    Garside element

    Garside_element

  • 8-cube
  • 8-dimensional hypercube

    hypercubes: Coxeter, Regular Polytopes, p. 12, Sec. 1.8 Configurations Coxeter (1991), p. 117. Klitzing, Richard. "o3o3o3o3o3o3o4x - octo". H.S.M. Coxeter: Coxeter

    8-cube

    8-cube

    8-cube

  • Colloquium Lectures (AMS)
  • Annual session of lectures

    1983 Bertram Kostant (Massachusetts Institute of Technology): On the Coxeter element and the structure of the exceptional Lie groups. 1984 Barry Mazur (Harvard

    Colloquium Lectures (AMS)

    Colloquium_Lectures_(AMS)

  • Uniform polyhedron
  • Isogonal polyhedron with regular faces

    among which they are finding the "regular" ones. — (Branko Grünbaum 1994) Coxeter, Longuet-Higgins & Miller (1954) define uniform polyhedra to be vertex-transitive

    Uniform polyhedron

    Uniform polyhedron

    Uniform_polyhedron

  • Bruhat order
  • Partial order on a Coxeter group

    order, or Chevalley–Bruhat order) is a partial order on the elements of a Coxeter group, that corresponds to the inclusion order on Schubert varieties. The

    Bruhat order

    Bruhat_order

  • Icosahedral symmetry
  • 3D symmetry group

    The full symmetry group is the Coxeter group of type H3. It may be represented by Coxeter notation [5,3] and Coxeter diagram . The set of rotational

    Icosahedral symmetry

    Icosahedral symmetry

    Icosahedral_symmetry

  • 6-cube
  • 6-dimensional hypercube

    three Coxeter groups associated with the 6-cube, one regular, with the C6 or [4,3,3,3,3] Coxeter group, and a half symmetry (D6) or [33,1,1] Coxeter group

    6-cube

    6-cube

    6-cube

  • 600-cell
  • Four-dimensional analog of the icosahedron

    expanded with k-face elements and k-figures. The diagonal element counts are the ratio of the full Coxeter group order, 14400, divided by the order of the subgroup

    600-cell

    600-cell

    600-cell

  • Wallpaper group
  • Classification of a two-dimensional repetitive pattern

    the other symmetries of the orbifold. Coxeter's bracket notation is also included, based on reflectional Coxeter groups, and modified with plus superscripts

    Wallpaper group

    Wallpaper group

    Wallpaper_group

  • 6-orthoplex
  • Regular 6 dimensional polytope

    labeled (checkerboarded) facets, with Schläfli symbol {3,3,3,31,1} or Coxeter symbol 311. It is a part of an infinite family of polytopes, called cross-polytopes

    6-orthoplex

    6-orthoplex

    6-orthoplex

  • Uniform 6-polytope
  • Uniform 6-dimensional polytope

    construction operations are represented by the permutations of rings of the Coxeter-Dynkin diagrams. Each combination of at least one ring on every connected

    Uniform 6-polytope

    Uniform 6-polytope

    Uniform_6-polytope

  • Kazhdan–Lusztig polynomial
  • Integral polynomial

    conjectures. Fix a Coxeter group W with generating set S, and write ℓ ( w ) {\displaystyle \ell (w)} for the length of an element w (the smallest length

    Kazhdan–Lusztig polynomial

    Kazhdan–Lusztig_polynomial

  • Isometry
  • Distance-preserving mathematical transformation

    which preserves length ..." — Coxeter (1969) p. 29 3.11 Any two congruent triangles are related by a unique isometry.— Coxeter (1969) p. 39 Let T be a transformation

    Isometry

    Isometry

    Isometry

  • Complex polytope
  • Generalization of a polytope in real space

    will create "starry" polygons, with overlapping element. So and are ordinary, while is starry. Coxeter enumerated this list of regular complex polygons

    Complex polytope

    Complex_polytope

  • Point groups in three dimensions
  • Groups of point isometries in 3 dimensions

    mirror planes passing through the same point are the finite Coxeter groups, represented by Coxeter notation. The point groups in three dimensions are widely

    Point groups in three dimensions

    Point_groups_in_three_dimensions

  • Polytope
  • Geometric object with flat sides

    use edge to refer to a ridge, while H. S. M. Coxeter uses cell to denote an (n − 1)-dimensional element.[citation needed] The terms adopted in this article

    Polytope

    Polytope

  • List of spherical symmetry groups
  • icosahedral symmetry. This article lists the groups by Schoenflies notation, Coxeter notation, orbifold notation, and order. John Conway used a variation of

    List of spherical symmetry groups

    List_of_spherical_symmetry_groups

  • Projective geometry
  • Type of geometry

    1997, p. 88. Coxeter 2003, p. v. Coxeter 1969, p. 229. Coxeter 2003, p. 14. Coxeter 1969, pp. 93, 261. Coxeter 1969, pp. 234–238. Coxeter 2003, pp. 111–132

    Projective geometry

    Projective_geometry

  • 24-cell
  • Regular object in four dimensional geometry

    Plattner Story." Coxeter 1973, pp. 292–293, Table I(ii); "24-cell". Coxeter 1973, p. 139, §7.9 The characteristic simplex. Coxeter 1973, p. 290, Table

    24-cell

    24-cell

    24-cell

  • Tetrahedron
  • Polyhedron with four faces

    tetrahedra. Coxeter 1973, pp. 292–293, Table I(i); "Tetrahedron, 𝛼3". Coxeter 1973, pp. 33–34, §3.1 Congruent transformations. Coxeter 1973, p. 63,

    Tetrahedron

    Tetrahedron

    Tetrahedron

  • 5-simplex
  • Regular 5-polytope

    is one of 19 uniform polytera based on the [3,3,3,3] Coxeter group, all shown here in A5 Coxeter plane orthographic projections. (Vertices are colored

    5-simplex

    5-simplex

  • Affine geometry
  • Euclidean geometry without distance and angles

    118 (exercise 3). Coxeter 1955, The Affine Plane, § 2: Affine geometry as an independent system Coxeter 1955, Affine plane, p. 8 Coxeter, Introduction to

    Affine geometry

    Affine geometry

    Affine_geometry

  • Decagon
  • Shape with ten sides

    orthogonal projections in various Coxeter planes: The number of sides in the Petrie polygon is equal to the Coxeter number, h, for each symmetry family

    Decagon

    Decagon

    Decagon

  • Uniform 9-polytope
  • Type of geometric object

    symmetry can be generated by these three Coxeter groups, represented by permutations of rings of the Coxeter-Dynkin diagrams: Selected regular and uniform

    Uniform 9-polytope

    Uniform 9-polytope

    Uniform_9-polytope

  • Regular complex polygon
  • Polygons which have an accompanying imaginary dimension for each real dimension

    will create "starry" polygons, with overlapping element. So and are ordinary, while is starry. Coxeter enumerated this list of regular complex polygons

    Regular complex polygon

    Regular complex polygon

    Regular_complex_polygon

  • Platonic solid
  • Any of the five regular polyhedra

    /2)={\frac {\cos(\pi /q)}{\sin(\pi /h)}}.} The quantity h (called the Coxeter number) is 4, 6, 6, 10, and 10 for the tetrahedron, cube, octahedron, dodecahedron

    Platonic solid

    Platonic solid

    Platonic_solid

  • Uniform 5-polytope
  • Five-dimensional geometric shape

    Coxeter in his publication Regular and Semi-Regular Polytopes I, II, and III. 1966: Norman W. Johnson completed his Ph.D. dissertation under Coxeter,

    Uniform 5-polytope

    Uniform 5-polytope

    Uniform_5-polytope

  • Regular tetrahedron
  • Solid with four equal triangular faces

    3-demicube, a polyhedron that is by alternating a cube. This form has Coxeter diagram and Schläfli symbol h { 4 , 3 } {\displaystyle \mathrm {h} \{4

    Regular tetrahedron

    Regular tetrahedron

    Regular_tetrahedron

  • List of regular polytopes
  • realization of this 1-polytope is regular. It has the Schläfli symbol { }, or a Coxeter diagram with a single ringed node, . Norman Johnson calls it a dion and

    List of regular polytopes

    List of regular polytopes

    List_of_regular_polytopes

  • Uniform 7-polytope
  • Seven-dimensional geometric object

    for Coxeter plane graphs of these polytopes. The E7 Coxeter group has order 2,903,040. There are 127 forms based on all permutations of the Coxeter-Dynkin

    Uniform 7-polytope

    Uniform 7-polytope

    Uniform_7-polytope

  • Cuboctahedron
  • Polyhedron with 8 triangles and 6 squares

    Williams 1979, p. 74. Coxeter 1973, p. 69, §4.7 Other honeycombs. Coxeter 1973, pp. 292–293, Table I (ii): column 0R/l. Coxeter 1973, p. 296, Table II:

    Cuboctahedron

    Cuboctahedron

    Cuboctahedron

  • 7-demicube
  • Uniform 7-polytope

    as HM7 for a 7-dimensional half measure polytope. Coxeter named this polytope as 141 from its Coxeter diagram, with a ring on one of the 1-length branches

    7-demicube

    7-demicube

    7-demicube

  • Rectified 5-simplexes
  • 5-cell and 6 rectified 5-cells). It is also called 03,1 for its branching Coxeter-Dynkin diagram, shown as . E. L. Elte identified it in 1912 as a semiregular

    Rectified 5-simplexes

    Rectified 5-simplexes

    Rectified_5-simplexes

  • 3 21 polytope
  • Uniform 7-dimensional polytope

    He called it a 7-ic semi-regular figure. Its Coxeter symbol is 321, describing its bifurcating Coxeter-Dynkin diagram, with a single ring on the end

    3 21 polytope

    3 21 polytope

    3_21_polytope

  • Dicyclic group
  • Type of cyclic group in group theory

    diagram at right, and parallels the corresponding diagram for the Pin group. Coxeter writes the binary dihedral group as ⟨2,2,n⟩ and binary cyclic group with

    Dicyclic group

    Dicyclic group

    Dicyclic_group

  • Convex uniform honeycomb
  • Spatial tiling of convex uniform polyhedra

    for other forms based on the ring patterns of the Coxeter diagram. The fundamental infinite Coxeter groups for 3-space are: The C ~ 3 {\displaystyle {\tilde

    Convex uniform honeycomb

    Convex uniform honeycomb

    Convex_uniform_honeycomb

  • Truncated 5-cell
  • of 9 uniform 4-polytope constructed from the [3,3,3] Coxeter group. H.S.M. Coxeter: H.S.M. Coxeter, Regular Polytopes, 3rd Edition, Dover New York, 1973

    Truncated 5-cell

    Truncated 5-cell

    Truncated_5-cell

  • J. A. Todd
  • British geometer

    The Todd–Coxeter process for coset enumeration is a major method of computational algebra, and dates from a collaboration with H.S.M. Coxeter in 1936.

    J. A. Todd

    J._A._Todd

  • 1 22 polytope
  • Uniform 6-polytope

    polytopes, named as V72 (for its 72 vertices). Its Coxeter symbol is 122, describing its bifurcating Coxeter-Dynkin diagram, with a single ring on the end

    1 22 polytope

    1 22 polytope

    1_22_polytope

  • Tetrahedral symmetry
  • 3D symmetry group

    Goodman-Strauss, ISBN 978-1-56881-220-5 Kaleidoscopes: Selected Writings of H.S.M. Coxeter, edited by F. Arthur Sherk, Peter McMullen, Anthony C. Thompson, Asia Ivic

    Tetrahedral symmetry

    Tetrahedral symmetry

    Tetrahedral_symmetry

  • Regular icosahedron
  • Solid with twenty equal triangular faces

    1 R {\displaystyle {}_{1}\!\mathrm {R} } is Coxeter's notation for the midradius, also noting that Coxeter uses 2 ℓ {\displaystyle 2\ell } as the edge

    Regular icosahedron

    Regular icosahedron

    Regular_icosahedron

  • 2 21 polytope
  • Uniform 6-polytope

    (021 polytope), . Seen in a configuration matrix, the element counts can be derived from the Coxeter group orders. Vertices are colored by their multiplicity

    2 21 polytope

    2 21 polytope

    2_21_polytope

  • 16-cell
  • Four-dimensional analog of the octahedron

    hyperoctahedrons which are analogous to the octahedron in three dimensions. It is Coxeter's β 4 {\displaystyle \beta _{4}} polytope. The dual polytope is the tesseract

    16-cell

    16-cell

    16-cell

  • Regular dodecahedron
  • Solid with 12 equal pentagonal faces

    Series). p. 4. Coxeter, H. S. M. (1973) [1948]. "§1.8 Configurations". Regular Polytopes (3rd ed.). New York: Dover Publications. Coxeter, H. S. M. (1991)

    Regular dodecahedron

    Regular dodecahedron

    Regular_dodecahedron

  • Complex reflection group
  • Concept in mathematics

    dihedral groups, and more generally all finite real reflection groups (the Coxeter groups or Weyl groups, including the symmetry groups of regular polyhedra)

    Complex reflection group

    Complex_reflection_group

  • Cyclic group
  • Mathematical group that can be generated as the set of powers of a single element

    by a single element. That is, it is a set of invertible elements with a single associative binary operation, and it contains an element g such that every

    Cyclic group

    Cyclic group

    Cyclic_group

  • Heptellated 8-simplexes
  • Polytopes H.S.M. Coxeter: H.S.M. Coxeter, Regular Polytopes, 3rd edition, Dover, New York, 1973 Kaleidoscopes: Selected Writings of H.S.M. Coxeter, edited by

    Heptellated 8-simplexes

    Heptellated 8-simplexes

    Heptellated_8-simplexes

  • Fundamental class
  • Homology class in mathematics

    top-dimension Schubert cell, or equivalently the longest element of a Coxeter group. Longest element of a Coxeter group Poincaré duality Hatcher, Allen (2002). Algebraic

    Fundamental class

    Fundamental_class

  • Cube
  • Solid with six equal square faces

    \mathrm {R} /\ell } , Coxeter's notation for the circumradius, midradius, and inradius, respectively, also noting that Coxeter uses 2 ℓ {\displaystyle

    Cube

    Cube

    Cube

  • Artin–Tits group
  • Family of infinite discrete groups

    Coxeter group, there is a (set-theoretic) section σ {\displaystyle \sigma } of W {\displaystyle W} into A + {\displaystyle A^{+}} , and every element

    Artin–Tits group

    Artin–Tits_group

  • Octagon
  • Polygon shape with eight sides

    at the origin and with side length 2 are: (±1, ±(1+√2)) (±(1+√2), ±1). Coxeter states that every zonogon (a 2m-gon whose opposite sides are parallel and

    Octagon

    Octagon

    Octagon

  • 7-simplex
  • Type of 7-polytope

    x3o3o3o3o3o3o - oca". Coxeter, H.S.M. (1973). "§1.8 Configurations". Regular Polytopes (3rd ed.). Dover. ISBN 0-486-61480-8. Coxeter, H.S.M. (1991). Regular

    7-simplex

    7-simplex

    7-simplex

  • Icosian
  • Specific set of Hamiltonian quaternions with the same symmetry as the 600-cell

    120 vectors form the vertices of a 600-cell, whose symmetry group is the Coxeter group H4 of order 14400. In addition, the 600 icosians of norm 2 form the

    Icosian

    Icosian

  • 6-simplex
  • Uniform 6-polytope

    one of 35 uniform 6-polytopes based on the [3,3,3,3,3] Coxeter group, all shown here in A6 Coxeter plane orthographic projections. Klitzing, Richard. "heptapeton"

    6-simplex

    6-simplex

  • 2 31 polytope
  • Uniform Polytope

    polytope, constructed from the E7 group. Its Coxeter symbol is 231, describing its bifurcating Coxeter-Dynkin diagram, with a single ring on the end

    2 31 polytope

    2 31 polytope

    2_31_polytope

  • Automatic group
  • all words in the finite group. Euclidean groups All finitely generated Coxeter groups Geometrically finite groups Baumslag–Solitar groups Non-Euclidean

    Automatic group

    Automatic_group

  • Configuration (polytope)
  • In geometry, H. S. M. Coxeter called a regular polytope a special kind of configuration.[citation needed] Other configurations in geometry are something

    Configuration (polytope)

    Configuration_(polytope)

  • One-dimensional symmetry group
  • Symmetry group in 1D systems

    the affine Coxeter group [∞], or Coxeter-Dynkin diagram representing two reflections, and the translational symmetry as [∞]+, or Coxeter-Dynkin diagram

    One-dimensional symmetry group

    One-dimensional_symmetry_group

  • ADE classification
  • Mathematical classification

    the simply laced finite Coxeter groups, by the same diagrams: in this case the Dynkin diagrams exactly coincide with the Coxeter diagrams, as there are

    ADE classification

    ADE classification

    ADE_classification

  • Cremona–Richmond configuration
  • generalized quadrangle with parameters (2,2). Its Levi graph is the Tutte–Coxeter graph. The points of the Cremona–Richmond configuration may be identified

    Cremona–Richmond configuration

    Cremona–Richmond configuration

    Cremona–Richmond_configuration

  • Building (mathematics)
  • Mathematical structure

    defining a building Δ is a Coxeter group W, which determines a highly symmetrical simplicial complex Σ = Σ(W, S), called the Coxeter complex. A building Δ

    Building (mathematics)

    Building_(mathematics)

  • Involution (mathematics)
  • Function that is its own inverse

    groups. An element x of a group G is called strongly real if there is an involution t with xt = x−1 (where xt = x−1 = t−1 ⋅ x ⋅ t). Coxeter groups are

    Involution (mathematics)

    Involution (mathematics)

    Involution_(mathematics)

  • (B, N) pair
  • Concept in group theory

    The set S is uniquely determined by B and N and the pair (W, S) is a Coxeter system. BN pairs are closely related to reductive groups and the terminology

    (B, N) pair

    (B,_N)_pair

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  • Marghub
  • Boy/Male

    Indian

    Marghub

    Desirable, Coveted, Pleasant

    Marghub

  • Cotter
  • Surname or Lastname

    Irish (co. Cork)

    Cotter

    Irish (co. Cork) : reduced Anglicized form of Gaelic Mac Oitir ‘son of Oitir’, a personal name borrowed from Old Norse Óttarr, composed of the elements ótti ‘fear’, ‘dread’ + herr ‘army’.English : status name from Middle English cotter, a technical term in the feudal system for a serf or bond tenant who held a cottage by service rather than rent, from Old English cot ‘cottage’, ‘hut’ (see Coates) + -er agent suffix.Probably an Americanized spelling of German Kotter.

    Cotter

  • Counter
  • Surname or Lastname

    English (Devon)

    Counter

    English (Devon) : occupational name for a treasurer or accountant, from Middle English counter (from Old French conteor).

    Counter

  • Custard
  • Surname or Lastname

    English

    Custard

    English : variant of Coster.

    Custard

  • Coster
  • Surname or Lastname

    English

    Coster

    English : metonymic occupational name for a grower or seller of costards (Anglo-Norman French, from coste ‘rib’), a variety of large apples, so called for their prominent ribs. In some cases, it may have been a nickname (from the same word) for a person with an apple-shaped (i.e. round) head.Dutch : status name for a churchwarden, from Late Latin custor ‘guard’, ‘warden’.Variant spelling of German Koster.This name is recorded in Beverwijck in New Netherland (Albany, NY) in the mid 17th century.

    Coster

  • Colter
  • Surname or Lastname

    English

    Colter

    English : occupational name for someone who looked after asses and horses, from an agent derivative of Colt. Compare Coulthard.Variant spelling of German Kolter.

    Colter

  • Marghoob
  • Boy/Male

    Muslim/Islamic

    Marghoob

    Desirable coveted, agreeable

    Marghoob

  • Marghoob
  • Boy/Male

    Arabic, Muslim

    Marghoob

    Agreeable; Desirable; Coveted

    Marghoob

  • Marghuba |
  • Girl/Female

    Muslim

    Marghuba |

    Coveted, Desired

    Marghuba |

  • Colter
  • Boy/Male

    American, British, English

    Colter

    Colt Herder; Keeper of the Colt Herd; Horse Herdsman; Variant of Colt; Young Horse; Frisky

    Colter

  • Coulter
  • Boy/Male

    American, Australian, British, English, Irish

    Coulter

    Young Horse; Frisky; Part of a Plough

    Coulter

  • Marghoob |
  • Boy/Male

    Muslim

    Marghoob |

    Desirable, Coveted, Pleasant

    Marghoob |

  • Coulter
  • Boy/Male

    English

    Coulter

    young horse;frisky.

    Coulter

  • Marghub |
  • Boy/Male

    Muslim

    Marghub |

    Desirable, Coveted, Pleasant

    Marghub |

  • Colter
  • Boy/Male

    English American

    Colter

    Horse herdsman. young horse;frisky.

    Colter

  • Marghoob
  • Boy/Male

    Indian

    Marghoob

    Desirable, Coveted, Pleasant

    Marghoob

  • Cooter
  • Surname or Lastname

    English (Sussex)

    Cooter

    English (Sussex) : unexplained.

    Cooter

  • Marghuba
  • Girl/Female

    Arabic, Muslim

    Marghuba

    Coveted; Desired

    Marghuba

  • Exeter
  • Boy/Male

    Shakespearean

    Exeter

    King Henry V' and 'Henry VI, Part 1' and 'King Henry the Sixth, Part III' Duke of Exeter, uncle...

    Exeter

  • Kesiraju
  • Boy/Male

    Arabic, Hindu, Indian

    Kesiraju

    Poeter

    Kesiraju

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Online names & meanings

  • chhavii | சாவீ
  • Girl/Female

    Tamil

    chhavii | சாவீ

    Picture

  • Shelina
  • Girl/Female

    Arabic, Muslim

    Shelina

    Soft

  • Merlyn
  • Boy/Male

    Arthurian Legend Welsh American Celtic

    Merlyn

    Sea fortress. In Arthurian mythology the wizard Merlin was King Arthur's mentor.

  • Savita | ஸவிதா
  • Girl/Female

    Tamil

    Savita | ஸவிதா

    Sun, Bright

  • Goffin
  • Surname or Lastname

    English (East Anglia)

    Goffin

    English (East Anglia) : either a diminutive of Goff or from a pet form of the personal name Godfrey.French : nickname from a diminutive of Old French goffe ‘heavy’, ‘coarse’.

  • PHARAO
  • Male

    Greek

    PHARAO

    (Φαραώ) Greek form of Hebrew Paroh ("great house"), PHARAO means "his nakedness." In the bible, this is a title for the king of Egypt.

  • Samriddha
  • Girl/Female

    Bengali, Indian

    Samriddha

    Gems of Hope; One who have Everything

  • Bayrd
  • Boy/Male

    Gaelic, German

    Bayrd

    One who Sings Ballads

  • Prani
  • Girl/Female

    Indian, Telugu

    Prani

    Animal

  • Childs
  • Surname or Lastname

    English

    Childs

    English : patronymic from Child 1.

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Other words and meanings similar to

COXETER ELEMENT

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  • Covetable
  • a.

    That may be coveted; desirable.

  • Counterirritation
  • n.

    See Counter irritant, etc., under Counter, a.

  • Coulter
  • n.

    Same as Colter.

  • Fish
  • n.

    A counter, used in various games.

  • Compter
  • n.

    A counter.

  • Countretaille
  • n.

    A counter tally; correspondence (in sound).

  • Counterrolment
  • n.

    A counter account. See Control.

  • Control
  • v. t.

    To check by a counter register or duplicate account; to prove by counter statements; to confute.

  • Counterprove
  • v. t.

    To take a counter proof of, or a copy in reverse, by taking an impression directly from the face of an original. See Counter proof, under Counter.

  • Counter
  • a.

    Contrary; opposite; contrasted; opposed; adverse; antagonistic; as, a counter current; a counter revolution; a counter poison; a counter agent; counter fugue.

  • Cotter
  • v. t.

    To fasten with a cotter.

  • Counter
  • adv.

    Same as Contra. Formerly used to designate any under part which served for contrast to a principal part, but now used as equivalent to counter tenor.

  • Counter
  • adv.

    A prefix meaning contrary, opposite, in opposition; as, counteract, counterbalance, countercheck. See Counter, adv. & a.

  • Losenger
  • n.

    A flatterer; a deceiver; a cozener.

  • Cotter
  • n.

    A piece of wood or metal, commonly wedge-shaped, used for fastening together parts of a machine or structure. It is driven into an opening through one or all of the parts. [See Illust.] In the United States a cotter is commonly called a key.

  • Culter
  • n.

    A colter. See Colter.

  • Coveter
  • n.

    One who covets.

  • Counter
  • adv.

    In the wrong way; contrary to the right course; as, a hound that runs counter.

  • Contratenor
  • n.

    Counter tenor; contralto.