Lagrangian Stability of a Class of Second-Order Periodic Systems
一类二阶周期系统的Lagrangian稳定性

舜君 江
2013 Pure Mathematics  
By the iteration of KAM, the following second-order differential equation:
doi:10.12677/pm.2013.36060 fatcat:6rsuir2xmvcwzkum3o4mowels4