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arXiv 2007.02345math.AP
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含奇异项和临界指数的分数阶 p-Kirchhoff 问题至少 k 个解的存在性

Existence of at least $k$ solutions to a fractional $p$-Kirchhoff problem involving singularity and critical exponent

Sekhar Ghosh, Debajyoti Choudhuri, Alessio Fiscella

AI总结:

本文研究含奇异项和临界 Sobolev 指数的分数阶 p-Kirchhoff 问题,通过截断论证和对称山路定理证明任意多个小能量非负解的存在性,并用 Moser 迭代得到解的一致有界性。

摘要:

我们研究以下含奇异性的非局部椭圆问题非负解的存在性:在 Ω 中满足 M(∫_Q |u(x)-u(y)|^p/|x-y|^{N+ps} dxdy)(-Δ)_p^s u = λ/|u|^{γ-1}u + |u|^{p_s^*-2}u,在 Ω 中 u>0,在 R^N\Ω 中 u=0,其中 Ω⊂R^N 是具有 Lipschitz 边界的有界区域,λ>0,N>ps,0<s,γ<1,(-Δ)_p^s 是 1<p<∞ 时的分数阶 p-Laplacian 算子,p_s^*=Np/(N-ps) 是临界 Sobolev 指数。我们采用截断(cut-off)论证得到 k(任意大的整数)个解的存在性。此外,通过使用 Moser 迭代技术,我们证明了解的 L^∞(Ω) 一致有界性。本工作的新颖之处在于,尽管存在临界非线性项(它当然是超线性的),仍利用对称山路定理证明了小能量解的存在性。

英文摘要:

We study the existence of nonnegative solutions to the following nonlocal elliptic problem involving singularity \begin{align} \mathfrak{M}\left(\int_{Q}\frac{|u(x)-u(y)|^p}{|x-y|^{N+ps}}dxdy\right)(-Δ)_{p}^{s} u&=\fracλ{|u|^{γ-1}u}+|u|^{p_s^*-2}u~\text{in}~Ω,\nonumber u&>0~\text{in}~Ω,\nonumber u&=0~\text{in}~\mathbb{R}^N\setminusΩ,\nonumber \end{align} where $Ω\subset\mathbb{R}^N$, is a bounded domain with Lipschitz boundary, $λ>0$, $N>ps$, $0<s,γ<1$, $(-Δ)_{p}^{s}$ is the fractional $p$-Laplacian operator for $1<p<\infty$ and $p_s^*=\frac{Np}{N-ps}$ is the critical Sobolev exponent. We employ a {\it cut-off} argument to obtain the existence of $k$ (being an arbitrarily large integer) solutions. Furthermore, by using the Moser iteration technique, we prove a uniform $L^{\infty}(Ω)$ bound for the solutions. The novelty of this work lies in proving the existence of small energy solutions by using the symmetric mountain pass theorem in spite of the presence of a critical nonlinear term which, of course, is super-linear.

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