考虑带部分周期位势的二阶非自治微分系统的周期解,在具有次线性非线性项时,利用临界点理论得到了多重周期解存在的充分条件.
We considered the periodic solutions for second order nonautonomous differential system with partially periodic potential and sublinear nonlinearity.Some sufficient conditions for the existence of multiple periodic solutions are obtained by using critical point theory.