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INSTABILITY FOR A CERTAIN FUNCTIONAL DIFFERENTIAL EQUATION OF SIXTH ORDER | Tunc | Journal of the Indonesian Mathematical Society 7 396 1 PB

J. Indones. Math. Soc.
Vol. 17, No. 2 (2011), pp. 123–128.

INSTABILITY FOR A CERTAIN FUNCTIONAL
DIFFERENTIAL EQUATION OF SIXTH ORDER
Cemil Tunç
Department of Mathematics, Faculty of Sciences, Yüzüncü Yıl University,
65080, Van -Turkey, cemtunc@yahoo.com

Abstract. Sufficient conditions are obtained for the instability of the zero solution
of a certain sixth order nonlinear functional differential equation by the LyapunovKrasovskii functional approach.
Key words: Instability, Lyapunov-Krasovskii functional, delay differential equation,
sixth order.

2000 Mathematics Subject Classification: 34K20.
Received: 11-07-2011, revised: 18-11-2011, accepted: 18-11-2011.
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