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arXiv 2102.09523math.AP
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二维Lane-Emden问题正解的非退化性和局部唯一性

Non-degeneracy and local uniqueness of positive solutions to the Lane-Emden problem in dimension two

Massimo Grossi, Isabella Ianni, Peng Luo, Shusen Yan

摘要:

我们考虑Lane-Emden问题\begin{equation*} \begin{cases} -Δu=u^{p} &{\text{in}~Ω},\\[0.5mm] u>0 &{\text{in}~Ω},\\[0.5mm] u=0 &{\text{on}~\partial Ω}, \end{cases} \end{equation*},其中$Ω\subset \mathbb R^2$是光滑有界区域,且$p>1$足够大.改进了一些已知的解的渐近估计,证明了一般区域上多尖峰正解的非退化性和局部唯一性。我们的方法主要利用常微分方程理论、各种局部Pohozaev恒等式、爆破分析和Green函数的性质。

英文摘要:

We are concerned with the Lane-Emden problem \begin{equation*} \begin{cases} -Δu=u^{p} &{\text{in}~Ω},\\[0.5mm] u>0 &{\text{in}~Ω},\\[0.5mm] u=0 &{\text{on}~\partial Ω}, \end{cases} \end{equation*} where $Ω\subset \mathbb R^2$ is a smooth bounded domain and $p>1$ is sufficiently large. Improving some known asymptotic estimates on the solutions, we prove the non-degeneracy and local uniqueness of the multi-spikes positive solutions for general domains. Our methods mainly use ODE's theory, various local Pohozaev identities, blow-up analysis and the properties of Green's function.

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