$α$ -调和函数的估计和结构
Estimates and structure of $α$-harmonic functions
摘要:
证明了任意开集$D$上分数阶Laplacian的非负调和函数的一致边界Harnack不等式.这就产生了一个独特的表示等功能的积分对措施$D^c\cup \{\infty\}$满足可积性条件。相应的马丁边界的$D$是一个子集的欧几里德边界确定的积分测试。
英文摘要:
We prove a uniform boundary Harnack inequality for nonnegative harmonic functions of the fractional Laplacian on arbitrary open set $D$. This yields a unique representation of such functions as integrals against measures on $D^c\cup \{\infty\}$ satisfying an integrability condition. The corresponding Martin boundary of $D$ is a subset of the Euclidean boundary determined by an integral test.
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