Multiplicity of solutions for a class of nonhomogeneous quasilinear elliptic system with locally symmetric condition in ${\mathbb{R}}^N$

This paper is concerned with a class of nonhomogeneous quasilinear elliptic system driven by the locally symmetric potential and the small continuous perturbations in the whole-space ${\mathbb{R}}^N$. By a variant of Clark’s theorem without the global symmetric condition and a Moser’s iteration technique, we obtain the existence of multiple solutions when the nonlinear term satisfies some growth conditions only in a circle with center 0 and the perturbation term is any continuous function with a small parameter and no any growth hypothesis.