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arXiv 2308.02455math.SPmath.AP
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非各向同性尖点的Robin特征值渐近

Asymptotics of Robin eigenvalues for non-isotropic peaks

Marco Vogel

AI总结:

本文研究了在原点处具有非各向同性尖点的区域上Robin边界条件Laplacian算子的强耦合渐近行为,证明了大耦合参数下特征值由一维Schrödinger算子的特征值决定。

摘要:

设$Ω\subset \mathbb{R}^3$为一开集,满足\begin{align*} &Ω\cap (-δ,δ)^3=\left\{(x_1,x_2,x_3)\in \mathbb{R}^2\times(0,δ): \, \left(\frac{x_1}{x_3^p},\frac{x_2}{x_3^q}\right)\in(-1,1)^2\right\}\subset\mathbb{R}^{3}, \\ &Ω\setminus [-δ,δ]^3 \text{ 是有界Lipschitz区域}, \end{align*}其中$δ>0$且$1<p<q<2$。若集合满足第一项条件,则称其在$0$处具有非各向同性尖点。现考虑算子$Q_Ω^α$,其在$Ω$上作为Laplacian $u\mapsto-Δu$作用,并在$\partialΩ$上满足Robin边界条件$\partial_νu=αu$,其中$\partial_ν$为外法向导数。我们关注$Q_Ω^α$的强耦合渐近行为。我们证明,对于较大的$α$,第$j$个特征值$E_j(Q_Ω^α)$的渐近行为为$E_j(Q_Ω^α)\approx \mathcal{A}_jα^{\frac{2}{2-q}}$,其中常数$\mathcal{A}_j<0$是依赖于$p$和$q$的一维Schrödinger算子的特征值。

英文摘要:

Let $Ω\subset \mathbb{R}^3$ be an open set such that \begin{align*} &Ω\cap (-δ,δ)^3=\left\{(x_1,x_2,x_3)\in \mathbb{R}^2\times(0,δ): \, \left(\frac{x_1}{x_3^p},\frac{x_2}{x_3^q}\right)\in(-1,1)^2\right\}\subset\mathbb{R}^{3}, \\ &Ω\setminus [-δ,δ]^3 \text{ is a bounded Lipschitz domain}, \end{align*} for some $δ>0$ and $1<p<q<2$. If a set satisfies the first condition one says that it has a non-isotropic peak at $0$. Now consider the operator $Q_Ω^α$ acting as the Laplacian $u\mapsto-Δu$ on $Ω$ with the Robin boundary condition $\partial_νu=αu$ on $\partialΩ$, where $\partial_ν$ is the outward normal derivative. We are interested in the strong coupling asymptotics of $Q_Ω^α$. We prove that for large $α$ the $j$th eigenvalue $E_j(Q_Ω^α)$ behaves as $E_j(Q_Ω^α)\approx \mathcal{A}_jα^{\frac{2}{2-q}}$, where the constants $\mathcal{A}_j<0$ are eigenvalues of a one dimensional Schrödinger operator which depends on $p$ and $q$.

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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