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arXiv 1209.0639math.DGmath.APmath.PR
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随机Morse函数与谱几何

Random Morse functions and spectral geometry

Liviu I. Nicolaescu

摘要:

研究了黎曼流形$(M^m,g)$上的随机Morse函数,定义为度量$g$的拉普拉斯算子的特征函数的随机高斯加权叠加.随机性由固定的Schwartz函数$w$和小参数$\varepsilon>0$确定。我们首先证明,作为$\varepsilon\to 0$的预期分布的临界值,这个随机函数的方法$\mathbb{R}$上的普遍措施,独立的$g$,可以明确描述的随机$(m+1)\times (m+1)$对称矩阵的高斯维格纳系综的特征值的预期分布。相反,我们证明了度量$g$和它的曲率是由随机函数的Hessian的统计小$\varepsilon$。

英文摘要:

We study random Morse functions on a Riemann manifold $(M^m,g)$ defined as a random Gaussian weighted superpositions of eigenfunctions of the Laplacian of the metric $g$. The randomness is determined by a fixed Schwartz function $w$ and a small parameter $\varepsilon>0$. We first prove that as $\varepsilon\to 0$ the expected distribution of critical values of this random function approaches a universal measure on $\mathbb{R}$, independent of $g$, that can be explicitly described in terms the expected distribution of eigenvalues of the Gaussian Wigner ensemble of random $(m+1)\times (m+1)$ symmetric matrices. In contrast, we prove that the metric $g$ and its curvature are determined by the statistics of the Hessians of the random function for small $\varepsilon$.

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