Tunc, CTunc, E2025-05-102025-05-1020051028-6276https://hdl.handle.net/20.500.14720/4569Sufficient conditions are established under which the zero solution X = 0 of equation (2) is unstable.eninfo:eu-repo/semantics/closedAccessNonlinear Differential EquationsSeventh OrderInstabilityLyapunov'S Second (Direct) MethodInstability of Solutions of Certain Nonlinear Vector Differential Equations of Order SevenArticle