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STUDY OF THE STABILITY BEHAVIOUR AND THE BOUNDEDNESS OF SOLUTIONS TO A CERTAIN THIRD-ORDER DIFFERENTIAL EQUATION WITH A RETARDED ARGUMENT
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作者 a.m.mahmoud D.A.M.Bakhit 《Annals of Applied Mathematics》 2019年第1期99-110,共12页
Lyapunov direct method is employed to investigate the asymptotic behaviour and the boundedness of solutions to a certain third-order differential equation with delay and some new results are obtained. Our results impr... Lyapunov direct method is employed to investigate the asymptotic behaviour and the boundedness of solutions to a certain third-order differential equation with delay and some new results are obtained. Our results improve and complement some earlier results. Two examples are given to illustrate the importance of the topic and the main results obtained. 展开更多
关键词 delay DIFFERENTIAL EQUATIONS ASYMPTOTIC BEHAVIOUR stability THIRD-ORDER DIFFERENTIAL EQUATIONS Lyapunov functional
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EXISTENCE OF PERIODIC SOLUTION FOR A KIND OF THIRD-ORDER GENERALIZED NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATION WITH VARIABLE PARAMETER
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作者 a.m.mahmoud E.S.Farghaly 《Annals of Applied Mathematics》 2018年第3期285-301,共17页
In this paper, we investigate a third-order generalized neutral functional differential equation with variable parameter. Based on Mawhin’s coincidence degree theory and some analysis skills, we obtain sufficient con... In this paper, we investigate a third-order generalized neutral functional differential equation with variable parameter. Based on Mawhin’s coincidence degree theory and some analysis skills, we obtain sufficient conditions for the existence of periodic solution for the equation. An example is also provided. 展开更多
关键词 existence of periodic solution third-order neutral functional differential equation variable parameter Mawhin's continuation theorem coincidence degree
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STABILITY OF SOLUTIONS FOR CERTAIN THIRD-ORDER NONLINEAR STOCHASTIC DELAY DIFFERENTIAL EQUATIONS
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作者 A.M.A.Abou-El-Ela A.I.Sadek +1 位作者 a.m.mahmoud E.S.Farghaly 《Annals of Applied Mathematics》 2015年第3期253-261,共9页
In this paper, we investigate stochastic asymptotic stability of the zero solution for certain third-order nonlinear stochastic delay differential equations by constructing Lyapunov functionals.
关键词 asymptotic stability Lyapunov functional stochastic delay differen-tial equations third-order nonlinear differential equations
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