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arXiv 2609.32655math.DGgr-qchep-th

第三个 Del Pezzo 曲面上的 Kähler-Einstein 度量

The Kähler-Einstein metric on the third Del Pezzo surface

Timothy Buttsworth, William Hadden, Elli Heyes, Daniel Platt, Toby Wiseman

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中文总结 AI 辅助

本文针对第三个 Del Pezzo 曲面上的 Kähler-Einstein 度量,通过解析与计算机辅助方法构造近似度量并证明其与真实度量接近,进而给出特征值界并否定正全纯截面曲率。

中文摘要 AI 辅助

紧致四维流形 $\mathbb{CP}_2\\# 3\overline{\mathbb{CP}_2}$ 已知允许一个环面的 Kähler-Einstein 度量 $g_{\text{KE}}$,但该度量没有闭式表达式,这使得对其几何性质得出结论变得困难。在本文中,我们结合解析和计算机辅助技术,构造了一个显式描述的近似 Einstein 度量 $g$,并证明了真实的 Einstein 度量 $g_{\text{KE}}$ 与 $g$ 接近,其中接近程度和拓扑结构均被显式描述。作为应用,我们证明了 Laplace-Beltrami 算子的第一不变特征值的界,并证明该 Kähler-Einstein 度量并非处处具有正的全纯截面曲率。

英文摘要

The compact four-dimensional manifold $\mathbb{CP}_2\# 3\overline{\mathbb{CP}_2}$ is known to admit a toric Kähler-Einstein metric $g_{\text{KE}}$, but the metric is not known in closed form, which makes it difficult to draw conclusions about its geometry. In this article, we use a combination of analytic and computer-assisted techniques to produce an approximate Einstein metric $g$ described explicitly herein, and also prove that the true Einstein metric $g_{\text{KE}}$ is close to $g$, where both the closeness and the topology are described explicitly. As an application, we prove bounds on the first invariant eigenvalue of the Laplace-Beltrami operator, and prove that this Kähler-Einstein metric does not have positive holomorphic sectional curvature everywhere.

发表机构

  • The University of New South Wales(新南威尔士大学)
  • Imperial College London(帝国理工学院)

机构由 AI 辅助整理,请以论文原文为准。

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