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Bifurcation analysis of a delayed SIS epidemic model with stage structure

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  • Zhang, Tailei
  • Liu, Junli
  • Teng, Zhidong

Abstract

This paper deals with a delayed SIS epidemic model with stage structure. The stability of the positive equilibrium and existence of Hopf bifurcation with delay τ is investigated. We show that the positive equilibrium is locally asymptotically stable when the time delay is small enough, while change of stability of positive equilibrium will cause a bifurcating periodic solution as the time delay τ passes through a sequence of critical values. Using the normal form theory and center manifold argument, we derive the explicit formulae for determining the direction of the bifurcation, the stability and other properties of the bifurcating periodic solutions. Analytic results are illustrated with numerical simulations.

Suggested Citation

  • Zhang, Tailei & Liu, Junli & Teng, Zhidong, 2009. "Bifurcation analysis of a delayed SIS epidemic model with stage structure," Chaos, Solitons & Fractals, Elsevier, vol. 40(2), pages 563-576.
    • Handle: RePEc:eee:chsofr:v:40:y:2009:i:2:p:563-576
    DOI: 10.1016/j.chaos.2007.08.004
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    References listed on IDEAS

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    1. Li, Xiuying & Wang, Wendi, 2005. "A discrete epidemic model with stage structure," Chaos, Solitons & Fractals, Elsevier, vol. 26(3), pages 947-958.
    2. Yang, Hong-Yong & Tian, Yu-Ping, 2005. "Hopf bifurcation in REM algorithm with communication delay," Chaos, Solitons & Fractals, Elsevier, vol. 25(5), pages 1093-1105.
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    Cited by:

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    2. Chen, Wei & Teng, Zhidong & Zhang, Long, 2021. "Global dynamics for a drug-sensitive and drug-resistant mixed strains of HIV infection model with saturated incidence and distributed delays," Applied Mathematics and Computation, Elsevier, vol. 406(C).

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