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arXiv 1402.4236math.DG
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几何流中具有位势的非线性Heat Equations的Harnack估计

Harnack Estimates for Nonlinear Heat Equations with Potentials in Geometric Flows

Hongxin Guo, Masashi Ishida

摘要:

设$M$是一个闭黎曼流形,其黎曼度量族$g_{ij}(t)$由几何流$\partial_{t}g_{ij} = -2{S}_{ij}$演化,其中$S_{ij}(t)$是$M$上的光滑对称二张量族.本文给出了一类非线性位势热方程\begin{eqnarray*} \frac{\partial f}{\partial t} = Δf + γ(t) f\log f +aSf, \end{eqnarray*}正解的微分Harnack估计,其中$γ(t)$是$t$上的连续函数,$a$是常数,$S=g^{ij}S_{ij}$是$S_{ij}$的迹.我们的Harnack估计包含了许多已知的结果作为特殊情况,而且导致了各种几何流的新的Harnack不等式。

英文摘要:

Let $M$ be a closed Riemannian manifold with a family of Riemannian metrics $g_{ij}(t)$ evolving by geometric flow $\partial_{t}g_{ij} = -2{S}_{ij}$, where $S_{ij}(t)$ is a family of smooth symmetric two-tensors on $M$. In this paper we derive differential Harnack estimates for positive solutions to the nonlinear heat equation with potential: \begin{eqnarray*} \frac{\partial f}{\partial t} = Δf + γ(t) f\log f +aSf, \end{eqnarray*} where $γ(t)$ is a continuous function on $t$, $a$ is a constant and $S=g^{ij}S_{ij}$ is the trace of $S_{ij}$. Our Harnack estimates include many known results as special cases, and moreover lead to new Harnack inequalities for a variety geometric flows.

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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