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arXiv 1804.00517math.DGmath.SP
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关于Einstein型Kähler流形的谱刚性

On the spectral rigidity of Einstein-type Kähler manifolds

Ping Li

摘要:

本文讨论了谱几何中一个经典的问题,这个问题可以追溯到McKean-Singer,Patodi和Tanno:复$n$维紧致Kähler流形的全纯截面曲率的恒定性是否可以完全由它的$p$ -Laplacian的特征值决定,其中$p$ -Laplacian是\emph{single}的整数$p$?我们在这篇文章中处理这个问题下两个爱因斯坦型条件:上同调爱因斯坦和法诺爱因斯坦。建立在我们以前的工作,我们表明,上同调的爱因斯坦凯勒流形,这是真实的,但所有对$(p,n)$。因此,标准的复射影空间在所有这些情形下都可以在上同调的爱因斯坦凯勒流形中用一个谱集来刻画。此外,在$p=0$的情形下,我们证明了复射影空间在Fano Kähler-Einstein流形中只能用第一个具有重数的非零特征值来刻画,这与藤田健人最近的一个显著结果有相似之处.

英文摘要:

We are concerned in this article with a classical question in spectral geometry dating back to McKean-Singer, Patodi and Tanno: whether or not the constancy of holomorphic sectional curvature of a complex $n$-dimensional compact Kähler manifold can be completely determined by the eigenvalues of its $p$-Laplacian for a \emph{single} integer $p$? We treat this question in this article under two Einstein-type conditions: cohomologically Einstein and Fano Einstein. Building on our previous work, we show that for cohomologically Einstein Kähler manifolds this is true for all but finitely many pairs $(p,n)$. As a consequence, the standard complex projective spaces can be characterized among cohomologically Einstein Kähler manifolds in terms of a single spectral set in all these cases. Moreover, in the case of $p=0$, we show that the complex projective spaces can be characterized among Fano Kähler-Einstein manifolds only in terms of the first nonzero eigenvalue with multiplicity, which has a similar flavor to a recent remarkable result due to Kento Fujita.

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