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arXiv 2210.09607math.PR
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二阶Bismut公式及其对流形上Neumann半群的应用

Second Order Bismut formulae and applications to Neumann semigroups on manifolds

Li-Juan Cheng, Anton Thalmaier, Feng-Yu Wang

摘要:

设$M$是具有边界$\partial M$的完全连通黎曼流形,$P_t$是由$\frac{ 1}{ 2} L$生成的Neumann半群,其中$L=Δ+Z$是$M$上的$C^1$ -向量场$Z$.我们建立了$LP_t f$和${\rm Hess}_{P_tf}$的Bismut型公式,并在适当的曲率条件下给出了这些量的估计。当$P_t$在$L^2(μ)$中对称时,对于某个概率测度$μ$,建立了一个新的log-Sobolev不等式,它将相对熵$H$,Stein差异$S$和相对Fisher信息$I$联系起来,推广了作者最近在无边界情形下的工作.

英文摘要:

Let $M$ be a complete connected Riemannian manifold with boundary $\partial M$, and let $P_t$ be the Neumann semigroup generated by $\frac{ 1}{ 2} L$ where $L=Δ+Z$ for a $C^1$-vector field $Z$ on $M$. We establish Bismut type formulae for $LP_t f$ and ${\rm Hess}_{P_tf}$ and present estimates of these quantities under suitable curvature conditions. In case when $P_t$ is symmetric in $L^2(μ)$ for some probability measure $μ$, a new type of log-Sobolev inequality is established which links the relative entropy $H$, the Stein discrepancy $S$, and relative Fisher information $I$, generalizing the authors' recent work in the case without boundary.

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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