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projective space is algebraic, all smooth complex algebraic varieties are
Kaehler manifolds. So they are of tremendous importance in (classical) algebraic geometry and in fact many modern theorems were motivated by those classical considerations. Another very important result is hodge and lefshetz decomposition, which is not mentioned at all in the article. I feel however not qualified enough to change the article accordingly, although in its current state it is less then satisfactory.
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On another article, "Hodge conjecture," the original author as saying at the head of this paragraph assumes Kahler manifold in order to be clear for the origin of Hodge conjecure, which is the properties of Kahler manifolds and fortunately on compact Kahler manifolds there exist such harmonic forms.
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This is incorrect. Kahler manifold is not absolute, as proven in the Hodge conjecture when one cannot assume X is a Kahler manifold due to decomposition not being constant. Hp, q(X) is not a subgroup of cohomology classes being that (X is not a Kahler manifold) and cannot be represented by harmonic
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vanish and Ricci curvature is much simplified. Therefore, the Kahler condition is closely related with Ricci curvature. In fact Aubin and Yau prove the Calabi conjecture using the fact that on a compact Kahler manifold with the first Chern class c_1=0 there is an unique Ricci-flat Kahler metric in
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Many sources define Kahler manifolds as symplectic manifolds with integrable compatible almost complex structures. The relation between this definition and the definition via Kahler metrics should be made explicit. I would be tempted to give the definition mentioned here first in the article, and
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Hermitian manifold. The Kahler condition is stronger than the
Hermitian condition because a closed hermitian form is Kahler. I think that Kahler metric should translate to Kahler manifold, not to Hermitian manifold. But I don't know the way to release or delete the redirection Kahler metric to
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A special class of
Kaehler manifolds are Calabi-Yau manifolds, as is mentioned in the article. Those are very important in stringtheory. Besides the n-dimensional complex projective space is a Kaehler manifold, as is every closed submanifold. Since by Chows theorem every closed submanifold of
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Kähler manifolds are usually thought of as finite dimensional manifolds. There is a generalized theory of infinite dimensional manifold, but it would be good to give at least one reference to literature dealing primarily with finite dimensional Kähler manifold.
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I think that in "application" we should refer not only "Einstein manifold" but also "Calabi conjecture". In "application" I would point out the above important facts and would make a relevant link in order to naturally fill some
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The Kahler condition is originally independent on the
Einstein condition, i.e. the Riemannian metric tensor is proportional to Ricci tensor for constant real number. The important point is that if
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I'm really not a specialist, but is there a reason why the article makes no mention of the fundamental Kahler identity? Does it only hold for a certain class of Kahler manifold? Just wondering --
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I recognized some entanglements between 3 articles, Hermitian mfd., Kahler mfd. and Ricci tensor. Firstly, I found a unexpected translation, Kahler metric (redirect)-: -->
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I have rewritten a fair amount of the article and tried to take into consideration all of the points addressed on this talk page. It is thus far only a cursory rewrite.
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I have removed the original author's definition of a Kähler manifold, since it seemed incredibly wishy-washy. For example, the article often referred to "an additional
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I think that the potential might not be global though someone wrote "the (global) potential." I will confirm it. And I will add
Laplacians on Kahler manifolds.--
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made the idea more explicit that would be sufficient. If anyone could provide a reference for this, I would be more than happy to do the write-up.
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titled as "Ricci tensor and Kahler manifolds." Then it naturally leads to relate Kahler manifolds with
Einstein manifolds in the next topic. --
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On this article, "Kahler manifold," the definition from the symplectic viewpoint is not dependent on harmonic forms as someone wrote.
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then later mention the relation with Kahler metrics. Of course, being a symplectic geometer I may be biased. What do other thinks?
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15 Feb 2013 someone, whose address is 24.154.111.112, has written on this article and the article "Hodge conjecture."
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addressed here refers to the same thing except for the difference except for the difference in real constants.
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Of course, the above points are found in the Part 4 in Andrei
Moroianu, Lectures on Kähler Geometry (2004)
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I have corrected the destination of redirection "Kahler metric" from "Hermitian mfd." to "Kahler mfd.".--
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I would love to re-incorporate the definition wherein we endow the tangent frame bundle with an integral
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I think this entry would benefit if the importance of Kahler manifolds is explained. I don't know it.
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I decide to delete the word "global" because a compact Kahler manifold has not global potential.
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each Kahler class, though in non-compact case the situation turns to be more complicated.
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And it is also necessary in terms of the holonomy. So I add a reference to
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I will add some explanations about "The
Laplacians on Kahler manifolds."--
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Hermitian manifold. Another entanglments might are between them.--
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Thanks everybody! I had translated this article into
Japanese.--
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I second this comment. Kähler manifolds need to be motivated.
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