Tunc, CemilAtes, Muzaffer2025-05-102025-05-1020162086-8952https://hdl.handle.net/20.500.14720/16513This paper establishes certain sufficient conditions to guarantee the nonexistence of periodic solutions for a class of nonlinear vector differential equations of fifth order. With this work, we extend and improve two related results in the literature from scalar cases to vectorial cases. An example is given to illustrate the theoretical analysis made in this paper.eninfo:eu-repo/semantics/openAccessInstabilityLyapunov FunctionNonlinearVector Differential EquationFifth OrderArticle221N/AQ48392WOS:000383260800006