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
Elliptic surface (section Canonical bundle formula)
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
: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
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
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
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
Coherent sheaf (redirect from Vector bundle over a ringed space)
, 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
Kodaira dimension (redirect from Canonical dimension)
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
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
Tautological one-form (redirect from Canonical one form)
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
Iitaka dimension (redirect from Big line bundle)
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
Gauge theory (mathematics) (section Principal bundles)
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
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