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arXiv 0908.2888math.PRmath.DG
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带边界流形上的Harnack不等式及其应用

Harnack Inequalities on Manifolds with Boundary and Applications

Feng-Yu Wang

摘要:

在一大类带边界的黎曼流形上,证明了Neumann半群的一些无量纲Harnack不等式等价于边界的凸性和一个曲率条件.特别地,对于$p_t(x,y)$,Neumann热核w.r.t.对于体积类型测度$μ$,对于$K$,曲率条件$\Ric-\nn Z\ge K$与边界的凸性一起等价于热核熵不等式$$\int_M p_t(x,z)\log \ff{p_t(x,z)}{p_t(y,z)} μ(\d z)\le \ff{K\rr(x,y)^2}{2(\e^{2Kt}-1)}, t>0, x,y\in M,$$,其中$\rr$是黎曼距离。将主要结果部分推广到具有非凸边界的流形,并应用于导出HWI不等式。

英文摘要:

On a large class of Riemannian manifolds with boundary, some dimension-free Harnack inequalities for the Neumann semigroup is proved to be equivalent to the convexity of the boundary and a curvature condition. In particular, for $p_t(x,y)$ the Neumann heat kernel w.r.t. a volume type measure $μ$ and for $K$ a constant, the curvature condition $\Ric-\nn Z\ge K$ together with the convexity of the boundary is equivalent to the heat kernel entropy inequality $$\int_M p_t(x,z)\log \ff{p_t(x,z)}{p_t(y,z)} μ(\d z)\le \ff{K\rr(x,y)^2}{2(\e^{2Kt}-1)}, t>0, x,y\in M,$$ where $\rr$ is the Riemannian distance. The main result is partly extended to manifolds with non-convex boundary and applied to derive the HWI inequality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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