Periodic solutions of fourth-order delay differential equation
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Abstract:
In this paper the periodic solutions of fourth order delay differential equation of the form $ddddot{x}(t)+adddot{x}(t)+f(ddot{x}(t-tau(t)))+g(dot{x}(t-tau(t)))+h({x}(t-tau(t)))=p(t)$ is investigated. Some new positive periodic criteria are given.
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Journal title
volume 41 issue 2
pages 307- 314
publication date 2015-04-01
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