Tunc, CemilSevli, Hamdullah2025-05-102025-05-1020051512-00152-s2.0-85014280759https://hdl.handle.net/20.500.14720/4575Tunc, Cemil/0000-0003-2909-8753; Sevli, Hamdullah/0009-0003-0258-031XThe main purpose of this paper is to give sufficient conditions which guarantee the instability of the trivial solution of a nonlinear vector differential equation as follows: X-(5) + psi((X) over dot,<(X)double over dot>)(X) triple over dot + (phi)(X,(X) over dot ,<(X)double over dot>) + circle minus(X) over dot + F(X) 0.eninfo:eu-repo/semantics/closedAccessNonlinear Differential Equations Of Fifth OrderInstabilityLyapunov'S MethodArticle35N/AQ4147156WOS:000415408500008