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arXiv 2107.06324math.APmath.CV
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Dini域边界附近调和函数的展开

Expansion of harmonic functions near the boundary of Dini domains

Carlos Kenig, Zihui Zhao

摘要:

设$u$是$C^1$ -Dini域中的调和函数,使得$u$在边界的开集上为零.我们发现,在开集的每一个点附近,$u$可以被唯一地写为一个非平凡的齐次调和多项式和一个误差项的较高程度(取决于Dini参数)的总和。特别地,这意味着$u$在每个这样的点处具有唯一的正切函数,并且可以估计到正切函数的收敛速度。我们还研究了特殊情况下邻近点处的正切函数之间的关系。

英文摘要:

Let $u$ be a harmonic function in a $C^1$-Dini domain, such that $u$ vanishes on an open set of the boundary. We show that near every point in the open set, $u$ can be written uniquely as the sum of a non-trivial homogeneous harmonic polynomial and an error term of higher degree (depending on the Dini parameter). In particular, this implies that $u$ has a unique tangent function at every such point, and that the convergence rate to the tangent function can be estimated. We also study the relationship of tangent functions at nearby points in a special case.

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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