Download e-book for kindle: Lectures on Kähler Manifolds (Esi Lectures in Mathematics by Werner Ballmann

By Werner Ballmann

ISBN-10: 3037190256

ISBN-13: 9783037190258

Those notes are according to lectures the writer gave on the collage of Bonn and the Erwin Schrödinger Institute in Vienna. the purpose is to provide an intensive advent to the speculation of Kähler manifolds with distinct emphasis at the differential geometric aspect of Kähler geometry. The exposition starts off with a quick dialogue of advanced manifolds and holomorphic vector bundles and an in depth account of the elemental differential geometric homes of Kähler manifolds. The extra complicated subject matters are the cohomology of Kähler manifolds, Calabi conjecture, Gromov's Kähler hyperbolic areas, and the Kodaira embedding theorem. a few familiarity with worldwide research and partial differential equations is thought, particularly within the half at the Calabi conjecture. There are appendices on Chern-Weil idea, symmetric areas, and $L^2$-cohomology.

A ebook of the eu Mathematical Society (EMS). dispensed in the Americas by means of the yank Mathematical Society.

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Extra info for Lectures on Kähler Manifolds (Esi Lectures in Mathematics and Physics)

Example text

Both preserve the type of forms. 36) ˆ D denotes the where the frame (Z1 , Z1 , . . 30) and where R ∗ ˆ curvature tensor of D on A (M, E). 37 Exercises. 1) Show that, for a differential form ϕ ⊗ σ of degree r, ∂ D (ϕ ⊗ σ) = ∂ϕ ⊗ σ + (−1)r ϕ ∧ D′ σ, ∂(ϕ ⊗ σ) = ∂ϕ ⊗ σ + (−1)r ϕ ∧ D′′ σ. 36 and show that 4 ˆ 2 α(Zj , Zj ) = tr D ˆ 2α + i D ˆ D (Xj , JXj )α, R 4 ˆ 2α + i ˆ 2 α(Zj , Zj ) = tr D D ˆ D (JXj , Xj )α. 4 Holomorphic Line Bundles. The results in this subsection will be mainly used in Section 9.

Scalar multiplication by Z2 on C2 descends to an action of Z2 on T 4 . This action has 16 fixed points, namely the points with integral or half-integral coordinates in T 4 . At each fixed point x ∈ T 4 , the action is locally of the form ±1 · (x + t) = x ± t as above. Thus we can resolve each of the quotient singularities on T 4 /Z2 by the above construction and obtain a compact complex surface, the Kummer surface. 3]. 8 Let m ≥ 2 and T = Γ\Cm be a complex torus. Let (p1 , . . , pk ) and (p′1 , .

Since ω is of type (1,1), we have ∂β = 0, ∂ β¯ = 0 ¯ and ω = ∂β + ∂ β. 49 ¨ hler Manifolds 4 Ka Hence β = ∂ϕ locally, where ϕ is a smooth complex function. Then β¯ = ∂ϕ and hence ω = ∂∂ϕ + ∂∂ϕ = ∂∂(ϕ − ϕ) = i∂∂f with f = i(ϕ − ϕ). We explain now that (4) ⇒ (7). Let z be holomorphic coordinates centered at p0 such that g(0) = 1. Then g(z) = 1+O(|z|). We solve for new holomorphic coordinates z˜ such that 1 z j := z˜j + Ajkl z˜k z˜l , 2 where Ajkl = − ∂glj ∂z k (0). Applying (4) we get that g˜(˜ z ) = 1 + O(|˜ z |2 ).

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Lectures on Kähler Manifolds (Esi Lectures in Mathematics and Physics) by Werner Ballmann


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