On Gradient Estimates for a Nonlinear Parabolic Equation on Riemannian Manifolds
On Gradient Estimates for a Nonlinear Parabolic Equation on Riemannian Manifolds
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发表时间:
2010
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通讯作者:
B. Qian
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作者:
B. Qian
Let (M, g) be a complete noncompact Riemannian manifold. In this note, we derive a local gradient estimate for positive solution to a simple nonlinear parabolic equation ∂tu =Δ u + au log u + bu, on M × (0, ∞), where a, b are constants. This equation is closely related to the gradient Ricci soliton. We simplify and improve the result obtained by Y. Yang (Proc. AMS, 136 (2008), 4095-4102).