Existence and multiplicity of solutions for a class of Kirchhoff type $(\Phi_1,\Phi_2)$-Laplacian system with locally super-linear condition in $\mathbb{R}^N$

TL;DR

This paper proves the existence and multiplicity of solutions for a nonlinear Kirchhoff type $( abla, abla)$-Laplacian system in $ abla^N$, using variational methods under weaker super-linear conditions than traditionally assumed.

Contribution

It introduces a weaker locally super-$(m_1,m_2)$ condition for the nonlinear term and establishes existence and multiplicity results using Mountain Pass Theorem and Symmetric Mountain Pass Theorem.

Findings

At least one weak solution exists under the super-$(m_1,m_2)$ condition.

Infinitely many high-energy solutions are obtained under a global super-linear restriction.

Results extend previous work to more general nonlinearities and unbounded domains.

Abstract

We investigate the existence and multiplicity of weak solutions for a nonlinear Kirchhoff type quasilinear elliptic system on the whole space $\mathbb{R}^N$. We assume that the nonlinear term satisfies the locally super-$(m_1,m_2)$ condition, that is, $\lim_{|(u,v)|\rightarrow+\infty}\frac{F(x,u,v)}{|u|^{m_1}+|v|^{m_2}}=+\infty \mbox{ for a.e. } x \in G$ where $G$ is a domain in $\mathbb{R}^N$, which is weaker than the well-known Ambrosseti-Rabinowitz condition and the naturally global restriction, $\lim_{|(u,v)|\rightarrow+\infty}\frac{F(x,u,v)}{|u|^{m_1}+|v|^{m_2}}=+\infty \mbox{ for a.e. } x \in \mathbb{R}^N$. We obtain that system has at least one weak solution by using the classical Mountain Pass Theorem. To a certain extent, our theorems extend the results of Tang-Lin-Yu [Journal of Dynamics and Differential Equations, 2019, 31(1): 369-383]. Moreover, under the above naturally global restriction, we obtain that system has infinitely many weak solutions of high energy by using the Symmetric Mountain Pass Theorem, which is different from those results of Wang-Zhang-Fang [Journal of Nonlinear Sciences and Applications, 2017, 10(7): 3792-3814] even if we consider the system on the bounded domain with Dirichlet boundary condition.