The uniqueness of the periodic solution for a class of differential equations.
Feng, Zhaosheng (2000)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
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Feng, Zhaosheng (2000)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
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Mei-Lan Tang, Xin-Ge Liu, Xin-Bi Liu (2009)
Applications of Mathematics
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The paper deals with the existence of periodic solutions for a kind of non-autonomous time-delay Rayleigh equation. With the continuation theorem of the coincidence degree and a priori estimates, some new results on the existence of periodic solutions for this kind of Rayleigh equation are established.
Lazer, Alan C. (2000)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Zbyněk Kubáček, Boris Rudolf (2005)
Archivum Mathematicum
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For a generalized pendulum equation we estimate the number of periodic solutions from below using lower and upper solutions and from above using a complex equation and Jensen’s inequality.