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arXiv 2501.05083math.AP
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具有对数扰动的临界 Kirchhoff 型椭圆方程解的存在性与多重性

Existence and multiplicity of solutions for a critical Kirchhoff type elliptic equation with a logarithmic perturbation

Qian Zhang, Yuzhu Han

AI总结:

本文利用变分方法研究具有对数扰动的临界 Kirchhoff 型椭圆方程,通过分析随空间维数变化的能量泛函结构,获得了不同维数下解的存在性与多重性结果。

摘要:

本文研究如下具有对数扰动的临界 Kirchhoff 型椭圆方程:\begin{equation*} \begin{cases} -\left(1+b\int_Ω|\nabla{u}|^2\mathrm{d}x\right) Δ{u}=λu+μu\log{u^2}+|u|^{2^{*}-2}u, &x\inΩ,\\\\ u=0,&x\in\partialΩ, \end{cases} \end{equation*} 其中 $Ω$ 是 $\mathbb{R}^{N}(N\geq3)$ 中具有光滑边界 $\partial Ω$ 的有界区域,$b$、$λ$ 和 $μ$ 为参数,$2^{*}=\frac{2N}{N-2}$ 是临界 Sobolev 指数。非局部项、临界非线性及对数项的存在,使得无法直接应用经典的临界点理论。此外,能量泛函的几何结构随空间维数 $N$ 变化,对解的存在性产生关键影响。基于对能量泛函结构的细致分析,利用变分方法获得了解的存在性与(或)多重性结果。具体而言,若 $N=3$,问题 (0.1) 存在局部极小解、基态解及一列其 $H_0^1(Ω)$-范数收敛于 $0$ 的解。若 $N=4$,亦得到无穷多解的存在性。当 $N\geq5$ 时,问题 (0.1) 存在具负能量的局部极小解。还导出了该局部极小解成为基态解的充分条件。

英文摘要:

In this paper, we are interested in the following critical Kirchhoff type elliptic equation with a logarithmic perturbation \begin{equation}\label{eq0} \begin{cases} -\left(1+b\int_Ω|\nabla{u}|^2\mathrm{d}x\right) Δ{u}=λu+μu\log{u^2}+|u|^{2^{*}-2}u, &x\inΩ,\\ u=0,&x\in\partialΩ, \end{cases} \end{equation} where $Ω$ is a bounded domain in $\mathbb{R}^{N}(N\geq3)$ with smooth boundary $\partial Ω$, $b$, $λ$ and $μ$ are parameters and $2^{*}=\frac{2N}{N-2}$ is the critical Sobolev exponent. The presence of a nonlocal term, together with a critical nonlinearity and a logarithmic term, prevents to apply in a straightforward way the classical critical point theory. Moreover, the geometry structure of the energy functional changes as the space dimension $N$ varies, which has a crucial influence on the existence of solutions to the problem. On the basis of some careful analysis on the structure of the energy functional, existence and (or) multiplicity results are obtained by using variational methods. More precisely, if $N=3$, problem (0.1) admits a local minimum solution, a ground state solution and a sequence of solutions with their $H_0^1(Ω)$-norms converging to $0$. If $N=4$, the existence of infinitely many solutions is also obtained. When $N\geq5$, problem (0.1) admits a local minimum solution with negative energy. Sufficient conditions are also derived for the local minimum solution to be a ground state solution.

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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