Tunc, Cemil2025-05-102025-05-1020082304-79092304-7895https://hdl.handle.net/20.500.14720/17327Our aim is essentially to establish a theorem which contains sufficient conditions that guarantee the non-existence of non-trivial periodic solutions of a certain nonlinear vector differential equation of fourth order.eninfo:eu-repo/semantics/closedAccessNonlinear Differential Equations Of Fourth OrderPeriodic SolutionThe Lyapunov'S Second (Or Direct) MethodArticle