Tunc, C.2025-05-102025-05-1020091536-005910.1007/s11072-009-0065-52-s2.0-70349570679https://doi.org/10.1007/s11072-009-0065-5https://hdl.handle.net/20.500.14720/11817Tunc, Cemil/0000-0003-2909-8753The main purpose of this paper is to give a result with explanatory example that deals directly with the instability of the trivial solution of a certain nonlinear vector differential equation of the fourth order. The result established here improves and includes a well-known instability result established for a scalar nonlinear differential equation of the fourth order.eninfo:eu-repo/semantics/closedAccessArticle121N/AN/A123132WOS:000269016600012