• the canonical bundle of a non-singular algebraic variety V {\displaystyle V} of dimension n {\displaystyle n} over a field is the line bundle Ω n =...
    16 KB (2,529 words) - 19:58, 22 July 2024
  • of canonical coordinates in classical mechanics may be generalized to a more abstract 20th century definition of coordinates on the cotangent bundle of...
    6 KB (872 words) - 00:34, 31 October 2023
  • also tautological bundles on a projective bundle of a vector bundle as well as a Grassmann bundle. The older term canonical bundle has dropped out of...
    14 KB (2,441 words) - 11:51, 28 December 2023
  • compute the canonical bundle of a minimal elliptic surface f: X → S. Over the complex numbers, Kodaira proved the following canonical bundle formula: K...
    16 KB (1,883 words) - 18:07, 26 July 2024
  • the canonical bundle in the ordinary case. It is sometimes also called the pure spinor bundle, as its sections are pure spinors. The canonical bundle is...
    20 KB (3,145 words) - 15:37, 16 February 2024
  • Thumbnail for Tangent bundle
    :TM\rightarrow M} is the canonical projection. Pushforward (differential) Unit tangent bundle Cotangent bundle Frame bundle Musical isomorphism The disjoint...
    17 KB (2,946 words) - 00:48, 7 December 2023
  • denoted h 0 ( X , L ) {\displaystyle h^{0}(X,L)} . Let K denote the canonical bundle on X. Then, the Riemann–Roch theorem states that h 0 ( X , L ) − h...
    32 KB (4,966 words) - 14:27, 17 December 2023
  • Thumbnail for Calabi–Yau manifold
    power of the canonical bundle of M {\displaystyle M} is trivial. M {\displaystyle M} has a finite cover that has trivial canonical bundle. M {\displaystyle...
    24 KB (3,249 words) - 04:34, 10 September 2024
  • ) {\displaystyle R(V,K)=R(V,K_{V})\,} of sections of powers of the canonical bundle K. Its nth graded component (for n ≥ 0 {\displaystyle n\geq 0} ) is:...
    4 KB (464 words) - 18:26, 21 May 2023
  • element of a set partition Canonical one-form, a special 1-form defined on the cotangent bundle T*M of a manifold M Canonical symplectic form, the exterior...
    5 KB (602 words) - 10:15, 4 August 2023
  • Thumbnail for Vector bundle
    vector bundle E* is the Hom bundle Hom(E, R × X) of bundle homomorphisms of E and the trivial bundle R × X. There is a canonical vector bundle isomorphism...
    31 KB (4,089 words) - 16:41, 9 April 2024
  • Thumbnail for Canonical form
    cotangent bundle. That bundle can always be endowed with a certain differential form, called the canonical one-form. This form gives the cotangent bundle the...
    19 KB (1,873 words) - 02:49, 30 June 2024
  • , the canonical bundle K X {\displaystyle K_{X}} means the line bundle Ω n {\displaystyle \Omega ^{n}} . Thus sections of the canonical bundle are algebro-geometric...
    40 KB (6,913 words) - 21:25, 2 April 2024
  • in H 0 ( X , L ) {\displaystyle H^{0}(X,L)} , canonically associated to the basepoint-free line bundle L. This morphism has the property that L is the...
    39 KB (6,685 words) - 15:21, 4 June 2024
  • the theory of complex manifolds, the adjunction formula relates the canonical bundle of a variety and a hypersurface inside that variety. It is often used...
    12 KB (2,340 words) - 16:01, 15 September 2024
  • dimensional varieties (under the name of canonical dimension), and later named it after Kunihiko Kodaira. The canonical bundle of a smooth algebraic variety X...
    20 KB (2,402 words) - 02:25, 9 June 2024
  • tangent bundle TX is an orientable vector bundle). A special set of coordinates can be defined on the cotangent bundle; these are called the canonical coordinates...
    9 KB (1,472 words) - 13:16, 8 January 2024
  • Thumbnail for K3 surface
    a compact connected complex manifold of dimension 2 with а trivial canonical bundle and irregularity zero. An (algebraic) K3 surface over any field means...
    34 KB (5,241 words) - 11:22, 18 August 2023
  • Poincaré one-form, the canonical one-form, or the symplectic potential. A similar object is the canonical vector field on the tangent bundle. To define the tautological...
    12 KB (1,250 words) - 20:55, 9 September 2024
  • in terms of the canonical bundle of X {\displaystyle X} : c 1 ( X ) < 0 {\displaystyle c_{1}(X)<0} if and only if the canonical bundle K X {\displaystyle...
    28 KB (4,231 words) - 06:11, 1 March 2024
  • Chern class of the tangent bundle) in H2(X, R). It follows that a compact Kähler–Einstein manifold X must have canonical bundle KX either anti-ample, homologically...
    33 KB (4,736 words) - 02:51, 10 August 2024
  • locally Noetherian scheme whose local rings are all Gorenstein. The canonical line bundle is defined for any Gorenstein scheme over a field, and its properties...
    6 KB (679 words) - 17:17, 14 January 2024
  • (L)\subset L\otimes K} with K {\displaystyle K} the canonical bundle over the Riemann surface M. Then a Higgs bundle ( E , φ ) {\displaystyle (E,\varphi )} is stable...
    4 KB (548 words) - 05:46, 10 July 2024
  • projective spaces are Fano varieties, because the canonical bundle is anti-ample and this line bundle has no non-zero global sections, so the geometric...
    7 KB (1,200 words) - 08:57, 7 November 2023
  • its canonical bundle is big, but the rational map it determines is not a birational isomorphism. Instead, it is a two-to-one cover of the canonical curve...
    7 KB (1,128 words) - 18:16, 27 September 2023
  • theory is the general study of connections on vector bundles, principal bundles, and fibre bundles. Gauge theory in mathematics should not be confused...
    72 KB (11,468 words) - 14:27, 13 June 2024
  • curvature form of the canonical line bundle (Moroianu 2007, Chapter 12). The canonical line bundle is the top exterior power of the bundle of holomorphic Kähler...
    34 KB (5,859 words) - 04:51, 6 July 2024
  • Thumbnail for Birational geometry
    modern definition is that a projective variety X is minimal if the canonical line bundle KX has nonnegative degree on every curve in X; in other words, KX...
    20 KB (2,684 words) - 22:32, 2 January 2024
  • If E is a vector bundle over a topological space X, then the projection map from E to X is the structure map. In topology, a canonical map is a function...
    3 KB (397 words) - 00:11, 13 May 2024
  • simply a line bundle (viewed as a complex in degree −dim(X)); this line bundle is called the canonical bundle of X. Using the canonical bundle, Serre duality...
    12 KB (1,662 words) - 10:00, 17 September 2024