Periodic solutions of a high order equation with deviating arguments.
Lin, Wen-Xian (2004)
Mathematica Pannonica
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Lin, Wen-Xian (2004)
Mathematica Pannonica
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Jin-Zhi Liu, Zhi-Yuan Jiang, Ai-Xiang Wu (2008)
Applications of Mathematics
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This paper is concerned with periodic solutions of first-order nonlinear functional differential equations with deviating arguments. Some new sufficient conditions for the existence of periodic solutions are obtained. The paper extends and improves some well-known results.
Wang, Genqiang, Yan, Jurang (2000)
International Journal of Mathematics and Mathematical Sciences
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Wang, Yong (2010)
Applied Mathematics E-Notes [electronic only]
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Wang, Genqiang, Yan, Jurang (2001)
Journal of Applied Mathematics and Stochastic Analysis
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Tailei Zhang, Junli Liu, Zhidong Teng (2012)
Applications of Mathematics
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An SEIR model with periodic coefficients in epidemiology is considered. The global existence of periodic solutions with strictly positive components for this model is established by using the method of coincidence degree. Furthermore, a sufficient condition for the global stability of this model is obtained. An example based on the transmission of respiratory syncytial virus (RSV) is included.
Carvalho, L.A.V., Ladeira, L.A.C., Martelli, M. (2000)
Portugaliae Mathematica
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Yang, Xiaojing (2000)
International Journal of Mathematics and Mathematical Sciences
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