On the Li-Yau type gradient estimate of Li and Xu
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🧮 math.DG
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estimategradientli-yautypeli-xuobtainargumentcases
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In this paper, we obtain a Li-Yau type gradient estimate with time dependent parameter for positive solutions of the heat equation, so that the Li-Yau type gradient estimate of Li-Xu are special cases of the estimate. We also obtain improvements of Davies' Li-Yau type gradient estimate. The argument is different with those of Li-Xu and Qian.
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