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arXiv 2005.13657math.AP
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涉及1-Laplacian算子的Gelfand型问题

Gelfand type problems involving the 1-Laplacian operator

Alexis Molino, Sergio Segura de León

摘要:

本文将Gelfand问题的理论推广到1-Laplacian情形。具体地说,我们研究了如下问题:\begin{equation*} \left\{\begin{array}{cc} -Δ_1u=λf(u) &\hbox{in }Ω\,;\\[2mm] u=0 &\hbox{on }\partialΩ\,; \end{array} \right. \end{equation*}其中$Ω\subset\mathbb{R}^N$($N\ge1$)是一个整环,$λ\geq 0$和$f\>:\>[0,+\infty[\to]0,+\infty[$是任意连续递增无界函数,其上有$f(0)>0$ .证明了存在一个阈值$λ^*=\frac{h(Ω)}{f(0)}$($h(Ω)$是$Ω$的Cheeger常数),使得当$λ>λ^*$时不存在解,当$λ\leλ^*$时平凡函数总是解.径向的情况下进行了更详细的分析,显示存在多个解决方案(甚至奇异),以及行为的解决方案的问题,涉及$p$-拉普拉斯$p$趋于1,这使我们能够通过一个额外的条件,以确定适当的解决方案。

英文摘要:

In this paper, the theory of Gelfand problems is adapted to the 1--Laplacian setting. Concretely, we deal with the following problem \begin{equation*} \left\{\begin{array}{cc} -Δ_1u=λf(u) &\hbox{in }Ω\,;\\[2mm] u=0 &\hbox{on }\partialΩ\,; \end{array} \right. \end{equation*} where $Ω\subset\mathbb{R}^N$ ($N\ge1$) is a domain, $λ\geq 0$ and $f\>:\>[0,+\infty[\to]0,+\infty[$ is any continuous increasing and unbounded function with $f(0)>0$. It is proved the existence of a threshold $λ^*=\frac{h(Ω)}{f(0)}$ (being $h(Ω)$ the Cheeger constant of $Ω$) such that there exists no solution when $λ>λ^*$ and the trivial function is always a solution when $λ\leλ^*$. The radial case is analyzed in more detail showing the existence of multiple solutions (even singular) as well as the behaviour of solutions to problems involving the $p$--Laplacian as $p$ tends to 1, which allows us to identify proper solutions through an extra condition.

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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