Journal
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
Volume 532, Issue 2, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmaa.2023.127928
Keywords
Gradient estimates; Heat kernel
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In this paper, a refined Hamilton's gradient estimate for the heat equation is presented, along with new Harnack inequalities and bounds of the associated heat kernels. Inspired by Yau's work, a generalized Li-Yau gradient estimate for the linear heat equation is obtained, extending some known results and generating new gradient estimates.
In this paper, we first present a refined Hamilton's gradient estimate for the heat equation which is firstly obtained by R.S. Hamilton (Comm. Anal. Geom., 1993). New Harnack inequalities and new bounds of the associated heat kernels are obtained. Inspired by Yau's work (Comm. Anal. Geom., 1994), we obtain a generalized Li-Yau gradient estimate for the linear heat equation, which generalizes some known results and generates new gradient estimates.(c) 2023 Elsevier Inc. All rights reserved.
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