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arXiv 2102.05549math.APmath.CA
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边界附近Steklov本征函数的节点集:内半径估计

Nodal sets of Steklov eigenfunctions near the boundary: Inner radius estimates

Stefano Decio

摘要:

我们表明,Steklov本征函数在有界Lipschitz域有波长密集的节点集附近的边界,相反,可以发生什么内部的域。作为逆,在二维Lipschitz域$Ω$中,我们证明了Steklov本征函数的任何节点域都包含一个以$\partialΩ$为中心,半径为$c_Ω/λ$的半球.

英文摘要:

We show that Steklov eigenfunctions in a bounded Lipschitz domain have wavelength dense nodal sets near the boundary, in contrast to what can happen deep inside the domain. As a converse, in a two-dimensional Lipschitz domain $Ω$, we prove that any nodal domain of a Steklov eigenfunction contains a half-ball centered at $\partialΩ$ of radius $c_Ω/λ$.

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