## Taiwanese Journal of Mathematics

### Infinitely Many Solutions for Sublinear Modified Nonlinear Schrödinger Equations Perturbed from Symmetry

#### Abstract

In this paper, we consider the existence of infinitely many solutions for the following perturbed modified nonlinear Schrödinger equations $\begin{cases} -\Delta u - \Delta(|u|^{\alpha}) |u|^{\alpha-2}u = g(x,u) + h(x,u) &x \in \Omega, \\ u = 0 &x \in \partial \Omega, \end{cases}$ where $\Omega$ is a bounded smooth domain in $\mathbb{R}^N$ ($N \geq 1$) and $\alpha \geq 2$. Under the condition that $g(x,u)$ is sublinear near origin with respect to $u$, we study the effect of non-odd perturbation term $h(x,u)$ which breaks the symmetry of the associated energy functional. With the help of modified Rabinowitz's perturbation method and the truncation method, we prove that this equation possesses a sequence of small negative energy solutions approaching to zero.

#### Article information

Source
Taiwanese J. Math., Volume 23, Number 4 (2019), 857-882.

Dates
Revised: 21 September 2018
Accepted: 30 September 2018
First available in Project Euclid: 18 July 2019

https://projecteuclid.org/euclid.twjm/1563436872

Digital Object Identifier
doi:10.11650/tjm/181002

Mathematical Reviews number (MathSciNet)
MR3982065

Zentralblatt MATH identifier
07088951

#### Citation

Zhang, Liang; Tang, Xianhua; Chen, Yi. Infinitely Many Solutions for Sublinear Modified Nonlinear Schrödinger Equations Perturbed from Symmetry. Taiwanese J. Math. 23 (2019), no. 4, 857--882. doi:10.11650/tjm/181002. https://projecteuclid.org/euclid.twjm/1563436872

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