运用临界点理论中的极小极大方法证明了一类超二次非自治二阶哈密顿系统非平凡周期解的存在性,并得到了一些新的可解性条件。
The existence of nontrivial periodic solutions is proved for a class of superquadratic nonautonomous second-order Hamiltonian systems by the minimax method in critical point theory, and some new solvability conditions are obtained.