Positive solution for an elliptic system with critical exponent and logarithmic terms: the higher-dimensional cases

IF 1.4 3区 数学 Q1 MATHEMATICS
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引用次数: 0

Abstract

In this paper, we consider the coupled elliptic system with critical exponent and logarithmic terms: $$\begin{aligned} {\left\{ \begin{array}{ll} -\Delta u=\lambda _{1}u+ \mu _1|u|^{2p-2}u+\beta |u|^{p-2}|v|^{p}u+\theta _1 u\log u^2, &{} \quad x\in \Omega ,\\ -\Delta v=\lambda _{2}v+ \mu _2|v|^{2p-2}v+\beta |u|^{p}|v|^{p-2}v+\theta _2 v\log v^2, &{}\quad x\in \Omega ,\\ u=v=0, &{}\quad x \in \partial \Omega , \end{array}\right. } \end{aligned}$$ where \(\Omega \subset {\mathbb R}^N\) is a bounded smooth domain, \(2p=2^*=\frac{2N}{N-2}\) is the Sobolev critical exponent. When \(N \ge 5\) , for different ranges of \(\beta ,\lambda _{i},\mu _i,\theta _{i}\) , \(i=1,2\) , we obtain existence and nonexistence results of positive solutions via variational methods. The special case \(N=4 \) was studied by Hajaiej et al. (Positive solution for an elliptic system with critical exponent and logarithmic terms, arXiv:2304.13822, 2023). Note that for \(N\ge 5\) , the critical exponent is given by \(2p\in \left( 2,4\right) \) ; whereas for \(N=4\) , it is \(2p=4\) . In the higher-dimensional cases \(N\ge 5\) brings new difficulties, and requires new ideas. Besides, we also study the Brézis–Nirenberg problem with logarithmic perturbation $$\begin{aligned} -\Delta u=\lambda u+\mu |u|^{2p-2}u+\theta u \log u^2 \quad \text { in }\Omega , \end{aligned}$$ where \(\mu >0, \theta <0\) , \(\lambda \in {\mathbb R}\) , and obtain the existence of positive local minimum and least energy solution under some certain assumptions.

具有临界指数和对数项的椭圆系统的正解:高维情况
Abstract In this paper, we consider the coupled elliptic system with critical exponent and logarithmic terms: $$\begin{aligned} {\left\{ \begin{array}{ll} -\Delta u=\lambda _{1}u+ \mu _1|u|^{2p-2}u+\beta |u|^{p-2}|v||^{p}u+\theta _1 u\log u^2, &{}\quad x\in \Omega ,\\ -\Delta v=\lambda _{2}v+ \mu _2|v|^{2p-2}v+\beta |u|^{p}|v|^{p-2}v+\theta _2 v\log v^2, &;{}\quad x\in \Omega ,\ u=v=0, &{}\quad x \in \partial \Omega , \end{array}\right.}\end{aligned}$$ 其中(Omega \subset {\mathbb R}^N)是一个有界的光滑域,(2p=2^*=frac{2N}{N-2}\)是索博勒夫临界指数。当 \(N \ge 5\), for different ranges of \(\beta ,\lambda _{i},\mu _i,\theta _{i}\), \(i=1,2\), we obtain existence and nonxistence results of positive solutions via variational methods.Hajaiej 等人研究了 \(N=4 \) 的特殊情况(Positive solution for an elliptic system with critical exponent and logarithmic terms, arXiv:2304.13822, 2023)。请注意,对于(N=5),临界指数由(2p÷in \left( 2,4\right) \)给出;而对于(N=4),临界指数是(2p=4)。在高维情况下,\(Nge 5\) 带来了新的困难,需要新的思路。此外,我们还研究了具有对数扰动的布雷齐斯-尼伦堡问题 $$\begin{aligned} -\Delta u=\lambda u+\mu |u|^{2p-2}u+\theta u \log u^2 \quad \text { in }\Omega , \end{aligned}$$ 其中 \(\mu >;0, \theta <0\) ,\(\lambda \in {\mathbb R}\) , 并在某些假设条件下得到正局部最小值和最小能量解的存在。
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来源期刊
CiteScore
3.10
自引率
5.60%
发文量
68
审稿时长
>12 weeks
期刊介绍: The Journal of Fixed Point Theory and Applications (JFPTA) provides a publication forum for an important research in all disciplines in which the use of tools of fixed point theory plays an essential role. Research topics include but are not limited to: (i) New developments in fixed point theory as well as in related topological methods, in particular: Degree and fixed point index for various types of maps, Algebraic topology methods in the context of the Leray-Schauder theory, Lefschetz and Nielsen theories, Borsuk-Ulam type results, Vietoris fractions and fixed points for set-valued maps. (ii) Ramifications to global analysis, dynamical systems and symplectic topology, in particular: Degree and Conley Index in the study of non-linear phenomena, Lusternik-Schnirelmann and Morse theoretic methods, Floer Homology and Hamiltonian Systems, Elliptic complexes and the Atiyah-Bott fixed point theorem, Symplectic fixed point theorems and results related to the Arnold Conjecture. (iii) Significant applications in nonlinear analysis, mathematical economics and computation theory, in particular: Bifurcation theory and non-linear PDE-s, Convex analysis and variational inequalities, KKM-maps, theory of games and economics, Fixed point algorithms for computing fixed points. (iv) Contributions to important problems in geometry, fluid dynamics and mathematical physics, in particular: Global Riemannian geometry, Nonlinear problems in fluid mechanics.
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