文摘
This paper is concerned with the following periodic Hamiltonian elliptic system: \(-\Delta u+V(x)u=H_{v}(x,u,v)\) , \(x\in\mathbb{R}^{N}\) , \(-\Delta v+V(x)v=H_{u}(x,u,v)\) , \(x\in\mathbb{R}^{N}\) , \(u(x)\to0\) , \(v(x)\to0\) as \(|x|\to\infty\) . Assuming the potential V is periodic and 0 lies in a gap of \(\sigma(-\Delta+V)\) , \(H(x,z)\) is periodic in x and superquadratic in \(z=(u,v)\) . We establish the existence of infinitely many large energy solutions by the generalized variant fountain theorem developed recently by Batkam and Colin.