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arXiv 0801.3506math.DGmath.AP
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关于Perelman LYH型不等式的若干结果

Some results for the Perelman LYH-type inequality

Shu-Yu Hsu

摘要:

令$(M,g(t))$,$0\le t\le T$,$\partial M\neϕ$是一个紧致的$n$维流形$n\ge 2$,度量$g(t)$由Ricci流演化,使得$\partial M$的第二基本型关于$\partial M$的单位外法线在$\partial M\times [0,T]$上一致有界.我们将证明$M\times [0,T]$上广义共轭热方程解的整体Li-Yau梯度估计。本文给出了闭流形上共轭热方程基本解的Perelman Li-Yau-Hamilton型不等式的另一个证明,但没有利用约化距离的性质.我们还将证明共轭热方程的Dirichlet基本解的各种梯度估计。

英文摘要:

Let $(M,g(t))$, $0\le t\le T$, $\partial M\neϕ$, be a compact $n$-dimensional manifold, $n\ge 2$, with metric $g(t)$ evolving by the Ricci flow such that the second fundamental form of $\partial M$ with respect to the unit outward normal of $\partial M$ is uniformly bounded below on $\partial M\times [0,T]$. We will prove a global Li-Yau gradient estimate for the solution of the generalized conjugate heat equation on $M\times [0,T]$. We will give another proof of Perelman's Li-Yau-Hamilton type inequality for the fundamental solution of the conjugate heat equation on closed manifolds without using the properties of the reduced distance. We will also prove various gradient estimates for the Dirichlet fundamental solution of the conjugate heat equation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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