Tunc, Cemil2025-05-102025-05-1020090129-20210219-175Xhttps://hdl.handle.net/20.500.14720/17268Criteria for uniform stability of the trivial solution of the nonlinear third order delay differential equation x '''(t) + a(1)(t) x ''(t) + a(2)(t)psi(x(t - r(t)), x '(t - r(t))) + a(3)x(t) = 0 are obtained by Lyapunov's second method. By constructing a Lyapunov functional, sufficient conditions are established which guarantee the trivial solution of this equation is uniformly stable. Our result improves a known result in the literature.eninfo:eu-repo/semantics/closedAccessStabilityLyapunov FunctionalNonlinear Differential Equations Of Third Order With Finite LagArticle