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arXiv 2201.11947math.PRmath.AP
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关于${\mathbb{Z}}^d$的椭圆Harnack不等式

Elliptic Harnack Inequality for ${\mathbb{Z}}^d$

Siva Athreya, Nitya Gadhiwala, Ritvik R. Radhakrishnan

摘要:

证明了${\mathbb{Z}}^d$上非负调和函数的尺度不变椭圆Harnack不等式(EHI).本说明的目的是提供一个简化的自包含的概率证明EHI在${\mathbb{Z}}^d$,是在本科层次访问。利用${\mathbb{Z}}^d$上简单对称随机游动的局部中心极限定理,建立了$n$ -步概率函数的高斯界.统一的Green不等式和经典的Balayage公式则隐含了EHI。

英文摘要:

We prove the scale invariant Elliptic Harnack Inequality (EHI) for non-negative harmonic functions on ${\mathbb{Z}}^d$. The purpose of this note is to provide a simplified self-contained probabilistic proof of EHI in ${\mathbb{Z}}^d$ that is accessible at the undergraduate level. We use the Local Central Limit Theorem for simple symmetric random walks on ${\mathbb{Z}}^d$ to establish Gaussian bounds for the $n$-step probability function. The uniform Green inequality and the classical Balayage formula then imply the EHI.

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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