• variety is a Kähler manifold. Hodge theory is a central part of algebraic geometry, proved using Kähler metrics. Since Kähler manifolds are equipped with...
    33 KB (4,738 words) - 17:09, 16 November 2024
  • that is Kähler with respect to g {\displaystyle g} . If ω I , ω J , ω K {\displaystyle \omega _{I},\omega _{J},\omega _{K}} denotes the Kähler forms of...
    13 KB (1,641 words) - 00:44, 7 November 2023
  • Thumbnail for Calabi–Yau manifold
    Kähler manifold with a vanishing first real Chern class has a Kähler metric in the same class with vanishing Ricci curvature. (The class of a Kähler metric...
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  • almost Kähler manifold. Any symplectic manifold admits a compatible almost complex structure making it into an almost Kähler manifold. A Kähler manifold is...
    10 KB (1,507 words) - 09:32, 5 June 2024
  • simply-connected Kähler manifold, a Kähler metric is Ricci-flat if and only if the holonomy group is contained in the special unitary group. On a general Kähler manifold...
    15 KB (1,867 words) - 17:23, 25 March 2024
  • differential geometry, a quaternion-Kähler manifold (or quaternionic Kähler manifold) is a Riemannian 4n-manifold whose Riemannian holonomy group is a...
    11 KB (1,448 words) - 18:51, 26 January 2024
  • Thumbnail for Erich Kähler
    complex manifold Complex Poisson manifold Hyper-Kähler manifold Kähler quotient Hyperkähler quotient Kähler–Einstein metric Nearly Kähler manifold Quaternion-Kähler...
    10 KB (1,021 words) - 21:17, 26 October 2024
  • Examples of Kähler manifolds include smooth projective varieties and more generally any complex submanifold of a Kähler manifold. The Hopf manifolds are examples...
    10 KB (1,311 words) - 18:37, 9 September 2024
  • sign of the first Chern class of the Kähler manifold: When the first Chern class is negative, there is always a Kähler–Einstein metric, as Thierry Aubin...
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  • curvature Kähler metric (cscK metric) is a Kähler metric on a complex manifold whose scalar curvature is constant. A special case is a Kähler–Einstein...
    8 KB (1,033 words) - 15:41, 13 July 2024
  • but are sometimes called quaternion Kähler manifolds otherwise. Higher-dimensional Lorentzian Einstein manifolds are used in modern theories of gravity...
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  • {\displaystyle M} . In particular, a Kähler manifold is nearly Kähler. The converse is not true. For example, the nearly Kähler six-sphere S 6 {\displaystyle...
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  • Kähler (1864–1941), German politician Kähler Keramik, a Danish ceramics manufacturer Kähler manifold, an important geometric complex manifold Kahler (disambiguation)...
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  • functions. On a Kähler manifold, the (p, q) components of a harmonic form are again harmonic. Therefore, for any compact Kähler manifold X, the Hodge theorem...
    28 KB (4,322 words) - 08:54, 10 October 2024
  • Kähler manifold is a symplectic manifold equipped with a compatible integrable complex structure. They form a particular class of complex manifolds....
    23 KB (3,630 words) - 23:54, 27 September 2024
  • Complex geometry (category Complex manifolds)
    submanifold of a Kähler manifold is Kähler, and so in particular every non-singular affine or projective complex variety is Kähler, after restricting...
    26 KB (3,677 words) - 14:31, 7 September 2023
  • Frölicher–Nijenhuis bracket Kähler manifold – Manifold with Riemannian, complex and symplectic structure Poisson manifold – Mathematical structure in...
    16 KB (2,399 words) - 23:55, 6 March 2024
  • Thumbnail for Shing-Tung Yau
    1954.[Y78a] As a special case, this showed that Kähler-Einstein metrics exist on any closed Kähler manifold whose first Chern class is nonpositive. Yau's...
    117 KB (10,547 words) - 04:31, 15 November 2024
  • manifold G2 manifold Kähler manifold Calabi–Yau manifold Hyperkähler manifold Quaternionic Kähler manifold Riemannian symmetric space Spin(7) manifold The Wikibook...
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  • Thumbnail for Hodge conjecture
    following questions: Hodge conjecture for Kähler varieties, vector bundle version. Let X be a complex Kähler manifold. Then every Hodge class on X is a linear...
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  • space must not only be Kähler, but also the Kähler form must lift to integral cohomology. Such manifolds are called Hodge manifolds. The first example appeared...
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  • Ricci curvature (category Riemannian manifolds)
    However, Kähler manifolds already possess holonomy in U ( n ) {\displaystyle U(n)} , and so the (restricted) holonomy of a Ricci-flat Kähler manifold is contained...
    34 KB (5,859 words) - 04:51, 6 July 2024
  • Ddbar lemma (category Complex manifolds)
    {\partial }}} -lemma is a result of Hodge theory and the Kähler identities on a compact Kähler manifold. Sometimes it is also known as the d d c {\displaystyle...
    18 KB (2,984 words) - 08:15, 17 February 2024
  • structure). A contact Riemannian manifold is Sasakian, if its Riemannian cone with the cone metric is a Kähler manifold with Kähler form t 2 d θ + 2 t d t ∧ θ...
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  • Thumbnail for Tian Gang
    prove existence of Kähler-Einstein metrics on closed Kähler manifolds with positive first Chern class, also known as "Fano manifolds." Tian and Yau extended...
    32 KB (3,114 words) - 23:03, 13 September 2024
  • compact Kähler manifold, applying hp,q = hq,p recovers the earlier definition for projective varieties. By using hp,q = hq,p for compact Kähler manifolds this...
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  • Thumbnail for Riemannian manifold
    single tangent space to the entire manifold, and many special metrics such as constant scalar curvature metrics and Kähler–Einstein metrics are constructed...
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  • In complex geometry, the Kähler identities are a collection of identities between operators on a Kähler manifold relating the Dolbeault operators and...
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  • over the complex numbers, amongst compact Kähler manifolds. In effect it says precisely which complex manifolds are defined by homogeneous polynomials....
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  • algebraic geometry, Hironaka's example is a non-Kähler complex manifold that is a deformation of Kähler manifolds found by Heisuke Hironaka (1960, 1962). Hironaka's...
    9 KB (1,238 words) - 03:55, 10 November 2024