The Periodic Solutions To Quadratic Differential Equations With Periodic Coefficients

To obtain the periodic solutions to quadratic differential equations withperiodic coefficients is very hard at general conditions, there is no general solutions. Thispaper give a way to obtain periodic solutions with the schauder fixed point theorem.Key words the Schauder fixed point theorem; periodic solutions; exponential dichotomyl991 MR SubJect cIassIllcatIon 34C...