In this paper,periodic solutions for a class of non - autonomous second order Hamiltonian Systems have been studied under the local linking at zero and“nonquadrat- ic”condition,and the proof has been obtained by the local compact condition i.
此文则研究了非自制二阶Hamilton系统在零点局部环绕及“非二次”条件下周期解的存在性,并利用局部紧性条件(C)条件以及极大极小方法证明了其周期解的存在性。