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Gradient estimates and differential Harnack inequalities for a nonlinear parabolic equation on Riemannian manifolds

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Abstract

Let (M n, g) be an n-dimensional complete Riemannian manifold. We consider gradient estimates for the positive solutions to the following nonlinear parabolic equation:

$$u_t=\Delta u+au\log u+bu$$

on M n × [0,T], where a, b are two real constants. We derive local gradient estimates of the Li-Yau type for positive solutions of the above equations on Riemannian manifolds with Ricci curvature bounded from below. As applications, several parabolic Harnack inequalities are obtained. In particular, our results extend the ones of Davies in Heat Kernels and Spectral Theory, Cambridge Tracts in Mathematics, vol 92, Cambridge University Press, Cambridge,1989, and Li and Xu in Adv Math 226:4456–4491 (2011).

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Authors and Affiliations

  1. Department of Mathematics, Henan Normal University, Xinxiang, 453007, People’s Republic of China

    Guangyue Huang

  2. Department of Mathematical Sciences, Tsinghua University, Beijing, 100084, People’s Republic of China

    Zhijie Huang & Haizhong Li

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  1. Guangyue Huang
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  2. Zhijie Huang
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  3. Haizhong Li
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Correspondence to Haizhong Li.

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Huang, G., Huang, Z. & Li, H. Gradient estimates and differential Harnack inequalities for a nonlinear parabolic equation on Riemannian manifolds. Ann Glob Anal Geom 43, 209–232 (2013). https://doi.org/10.1007/s10455-012-9342-0

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  • DOI: https://doi.org/10.1007/s10455-012-9342-0

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