## Topological Methods in Nonlinear Analysis

### Some nonlocal elliptic problem involving positive parameter

#### Abstract

We consider the following superlinear Kirchhoff type nonlocal problem: $$\begin{cases} \displaystyle -\bigg(a+b\int_\Omega |\nabla u|^2dx\bigg)\Delta u =\lambda f(x,u) & \text{in } \Omega,\ a > 0, \ b > 0, \ \lambda > 0, \\ u=0 &\text{on } \partial\Omega. \end{cases}$$ Here, $f(x,u)$ does not satisfy the usual superlinear condition, that is, for some $\theta > 0$, $$0\leq F(x,u)\overset{\triangle}{=} \int_0^u f(x,s)ds \leq \frac1{2+\theta}f(x,u)u, \quad \text{for all } (x,u)\in \Omega \times \mathbb{R}^+$$ or the following variant $$0\leq F(x,u) \overset{\triangle}{=} \int_0^u f(x,s)ds \leq \frac1{4+\theta}f(x,u)u, \quad \text{for all } (x,u)\in \Omega \times \mathbb{R}^+$$ which is quiet important and natural. But this superlinear condition is very restrictive eliminating many nonlinearities. The aim of this paper is to discuss how to use the mountain pass theorem to show the existence of non-trivial solution to the present problem when we lose the above superlinear condition. To achieve the result, we first consider the existence of a solution for almost every positive parameter $\lambda$ by varying the parameter $\lambda$. Then, it is considered the continuation of the solutions.

#### Article information

Source
Topol. Methods Nonlinear Anal., Volume 42, Number 1 (2013), 207-220.

Dates
First available in Project Euclid: 21 April 2016

https://projecteuclid.org/euclid.tmna/1461247301

Mathematical Reviews number (MathSciNet)
MR3155623

Zentralblatt MATH identifier
1291.35086

#### Citation

Mao, Anmin; Jing, Runan; Luan, Shixia; Chu, Jinling; Kong, Yan. Some nonlocal elliptic problem involving positive parameter. Topol. Methods Nonlinear Anal. 42 (2013), no. 1, 207--220. https://projecteuclid.org/euclid.tmna/1461247301

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