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arXiv 2109.08593math.CVmath.DG
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关于全纯向量丛的Bergman核

On the Bergman kernels of holomorphic vector bundles

László Lempert

摘要:

考虑紧致复流形上的一个非常充分的线丛$ E \to X$,它具有曲率的厄米度量$-i ω$,以及它的全纯截面的空间$\mathcal{O}(E)$。Fubini-研究图与$\mathcal{O}(E)$函数FS $(\langle \, ,\rangle) \in \mathcal{H}_ω=\{u \in C^{\infty}(X):ω+i\partial\overline{\partial} u >0\}$上的正定内积$\langle \, , \rangle$相关联。我们证明了FS是一个内射浸入,但它的图像一般是不封闭的$\mathcal{H}_ω$。为了获得闭范围,FS必须扩展到某些退化内积。我们这样做,通过关联伯格曼内核与一般内积的双重$\mathcal{O}(E)^*$,本文介绍了一些简单的性质,这种关联。

英文摘要:

Consider a very ample line bundle $ E \to X$ over a compact complex manifold, endowed with a hermitian metric of curvature $-i ω$, and the space $\mathcal{O}(E)$ of its holomorphic sections. The Fubini--Study map associates with positive definite inner products $\langle \, , \rangle$ on $\mathcal{O}(E)$ functions FS$(\langle \, ,\rangle) \in \mathcal{H}_ω=\{u \in C^{\infty}(X):ω+i\partial\overline{\partial} u >0\}$. We prove that FS is an injective immersion, but its image in general is not closed in $\mathcal{H}_ω$. To obtain a closed range, FS has to be extended to certain degenerate inner products. This we do by associating Bergman kernels with general inner products on the dual $\mathcal{O}(E)^*$, and the paper describes some simple properties of this association.

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