- generalized quadrangle
- мат.обобщённый четырехугольник
English-Russian scientific dictionary. 2008.
generalized quadrangle
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Generalized quadrangle — A generalized quadrangle is an incidence structure. A generalized quadrangle is by definition a polar space of rank two. They are the generalized n gons with n=4. They are also precisely the partial geometries pg(s,t,alpha). DefinitionA… … Wikipedia
Generalized n-gon — In combinatorial theory, a generalized n gon is an incidence structure introduced by Jacques Tits. Generalized polygons encompass as special cases projective planes (generalized triangles, n = 3) and generalized quadrangles ( n = 4), which form… … Wikipedia
Tolstoj quadrangle — The Tolstoj quadrangle in the equatorial region of Mercury runs from 144 to 216° longitude and 25 to 25° latitude. It was provisionally called Tir , but renamed after Leo Tolstoy by the International Astronomical Union in 1976. [International… … Wikipedia
Beethoven quadrangle — The Beethoven quadrangle is located in the equatorial region of Mercury, in the center of the area imaged by Mariner 10. Most pictures of the quadrangle were obtained at high sun angles as the Mariner 10 spacecraft receded from the planet.… … Wikipedia
Borealis quadrangle — The Borealis quadrangle is a quadrangle on Mercury surrounding the north pole down to 65° latitude (see also: geography of Mars).It contains the Goethe Basin, whose diameter of at least convert|400|km|abbr=on makes it the sixth largest impact… … Wikipedia
List of mathematics articles (G) — NOTOC G G₂ G delta space G networks Gδ set G structure G test G127 G2 manifold G2 structure Gabor atom Gabor filter Gabor transform Gabor Wigner transform Gabow s algorithm Gabriel graph Gabriel s Horn Gain graph Gain group Galerkin method… … Wikipedia
Oval (projective plane) — In mathematics, an oval in a projective plane is a set of points, no three collinear, such that there is a unique tangent line at each point (a tangent line is defined as a line meeting the point set at only one point, also known as a 1 secant).… … Wikipedia
Building (mathematics) — In mathematics, a building (also Tits building, Bruhat–Tits building) is a combinatorial and geometric structure which simultaneously generalizes certain aspects of flag manifolds, finite projective planes, and Riemannian symmetric spaces.… … Wikipedia
Polar space — In mathematics, in the field of combinatorics, a polar space of rank n ( n ge; 3), or projective index n −1, consists of a set P , conventionally the set of points, together with certain subsets of P , called subspaces , that satisfy these axioms … Wikipedia
Tutte–Coxeter graph — infobox graph name = Tutte–Coxeter graph image caption = namesake = W. T. Tutte H. S. M. Coxeter vertices = 30 edges = 45 girth = 8 chromatic number = 2 chromatic index = properties = Cubic Cage Moore graph Arc transitiveIn the mathematical field … Wikipedia
Partial geometry — An incidence structure S=(P,B,I) is a (finite) partial geometry if there are integers s,t,alphageq 1 such that:* For each two different points p and q , there is at most one line incident with both of them. * Each line is incident with s+1 points … Wikipedia
