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arXiv · 1610.03199

Gradient estimates for some $f$-heat equations driven by Lichnerowicz's equation on complete smooth metric measure spaces

Nguyen Thac Dung·Nguyen Ngoc Khanh·Quôc Anh Ngô
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Abstract

Given a complete, smooth metric measure space $(M,g,e^{-f}dv)$ with the Bakry-\'Emery Ricci curvature bounded from below, various gradient estimates for solutions of the following general $f$-heat equations $$ u_t=\Delta_f u+au\log u+bu +Au^p+Bu^{-q} $$ and \[ u_t=\Delta_f u+Ae^{pu}+Be^{-pu}+D \] are studied. As by-product, we obtain some Liouville-type theorems and Harnack-type inequalities for positive solutions of several nonlinear equations including the Schr\"{o}dinger equation, the Yamabe equation, and Lichnerowicz-type equations as special cases.

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Nguyen Thac Dung, Nguyen Ngoc Khanh, Quôc Anh Ngô. 2016-10-11. Gradient estimates for some $f$-heat equations driven by Lichnerowicz's equation on complete smooth metric measure spaces. https://doi.org/10.1007/s00229-017-0946-3

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