摘要：In this paper, we study a general second order differential equation with superlinear nonlinearity. We obtain ground state and geometrically distinct periodic solutions of this equation by a generalized Nehari manifold approach. In particular, our result extends some existing ones. MSC:32G34, 34C25.
关键词：second order differential equations ; ground state periodic solutions ; spectral gap ; generalized Nehari manifold approach
