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arXiv 1709.04822math.AP
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一类不定次线性狄利克雷问题的正解曲线

A curve of positive solutions for an indefinite sublinear Dirichlet problem

Uriel Kaufmann, Humberto Ramos Quoirin, Kenichiro Umezu

摘要:

我们调查的存在性曲线$q\mapsto u_{q}$,$q\in(0,1)$,正解的问题$(P_{a,q})$:$-Δu=a(x)u^{q}$在$Ω$,$u=0$上$\partialΩ$,其中$Ω$是一个有界的和光滑的域的$\mathbb{R}^{N}$和$a:Ω\rightarrow\mathbb{R}$是一个符号变化的功能(在这种情况下,强极大值原理不成立)。此外,我们还分析了$u_{q}$作为$q\rightarrow0^{+}$和$q\rightarrow1^{-}$的渐近行为.我们还表明,在某些情况下,$u_{q}$是$(P_{a,q})$的基态解。作为副产品,我们得到了一个奇异和不定狄利克雷问题的存在性结果。我们的结果主要是基于分歧和上下解方法。

英文摘要:

We investigate the existence of a curve $q\mapsto u_{q}$, with $q\in(0,1)$, of positive solutions for the problem $(P_{a,q})$: $-Δu=a(x)u^{q}$ in $Ω$, $u=0$ on $\partialΩ$, where $Ω$ is a bounded and smooth domain of $\mathbb{R}^{N}$ and $a:Ω\rightarrow\mathbb{R}$ is a sign-changing function (in which case the strong maximum principle does not hold). In addition, we analyze the asymptotic behavior of $u_{q}$ as $q\rightarrow0^{+}$ and $q\rightarrow1^{-}$. We also show that in some cases $u_{q}$ is the ground state solution of $(P_{a,q})$. As a byproduct, we obtain existence results for a singular and indefinite Dirichlet problem. Our results are mainly based on bifurcation and sub-supersolutions methods.

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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