
handle: 11104/0116973
The authors consider linear and nonlinear two-dimensional nonautonomous systems. The existence of periodic solutions is investigated. The conditions for the existence of periodic solutions are optimal in some sense.
two-dimensional nonautonomous periodic systems, two-dimensional nonautonomous differential system, Linear ordinary differential equations and systems, differential equations, periodic solutions, periodic solurion, Nonlinear ordinary differential equations and systems, Periodic solutions to ordinary differential equations, existence and uniqueness theorem
two-dimensional nonautonomous periodic systems, two-dimensional nonautonomous differential system, Linear ordinary differential equations and systems, differential equations, periodic solutions, periodic solurion, Nonlinear ordinary differential equations and systems, Periodic solutions to ordinary differential equations, existence and uniqueness theorem
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