# Instability of Non-Linear Functional Differential Equations of Fifth Order

## DOI:

https://doi.org/10.5614/itbj.sci.2012.44.3.4## Abstract

In this paper, we study the instability properties of solutions of a kind of functional differential equations of the fifth order with constant delay. Using the Lyapunov-Krasovskii functional approach, we obtain certain sufficient conditions to guarantee that the zero solution of the equation is unstable.## References

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