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arXiv 2303.05802math.AP
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光滑度量测度空间上非线性抛物型方程的梯度估计

Gradient estimates for a nonlinear parabolic equation on smooth metric measure spaces with evolving metrics and potentials

Ali Taheri, Vahideh Vahidifar

摘要:

本文在光滑度量测度空间的背景下,给出了涉及Witten Laplacian的非线性抛物型方程的正光滑解的新的抛物型和椭圆型梯度估计。这里的度规和势是不定常的,并且在一个超Perelman-里奇流下演化.这些估计是根据相关的广义Bakry-Émery里奇曲率张量的自然下界得出的,并用于建立相当普遍的局部和全局边界、Harnack型不等式和Liouville型全局恒常性定理等。其他影响和后果的结果进行了讨论。

英文摘要:

This article presents new parabolic and elliptic type gradient estimates for positive smooth solutions to a nonlinear parabolic equation involving the Witten Laplacian in the context of smooth metric measure spaces. The metric and potential here are time dependent and evolve under a super Perelman-Ricci flow. The estimates are derived under natural lower bounds on the associated generalised Bakry-Émery Ricci curvature tensors and are utilised in establishing fairly general local and global bounds, Harnack-type inequalities and Liouville-type global constancy theorems to mention a few. Other implications and consequences of the results 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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