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arXiv 1603.00166math.DG
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非线性heat equation的椭圆梯度估计及其应用

Elliptic gradient estimates for a nonlinear heat equation and applications

Jia-Yong Wu

摘要:

本文研究了一类非线性$f$ -热方程的椭圆梯度估计,它与光滑度量测度空间的梯度Ricci孤子和加权log-Sobolev常数有关.精确地说,我们得到了非线性$f$ -热方程正解的Hamilton和Souplet-Zhang梯度估计,仅假设Bakry-Émery Ricci张量有界.作为应用,我们证明了非线性$f$ -热方程的某些古解的抛物Liouville性质。还讨论了一些特殊情况。

英文摘要:

In this paper, we study elliptic gradient estimates for a nonlinear $f$-heat equation, which is related to the gradient Ricci soliton and the weighted log-Sobolev constant of smooth metric measure spaces. Precisely, we obtain Hamilton's and Souplet-Zhang's gradient estimates for positive solutions to the nonlinear $f$-heat equation only assuming the Bakry-Émery Ricci tensor is bounded below. As applications, we prove parabolic Liouville properties for some kind of ancient solutions to the nonlinear $f$-heat equation. Some special cases are also discussed.

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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