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Dynamics of a Multigroup SIR Epidemic Model with Nonlinear Incidence and Stochastic Perturbation

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  • Yuguo Lin
  • Daqing Jiang

Abstract

We introduce stochasticity into a multigroup SIR model with nonlinear incidence. We prove that when the intensity of white noise is small, the solution of stochastic system converges weakly to a singular measure (i.e., a distribution) if and there exists an invariant distribution which is ergodic if . This is the same situation as the corresponding deterministic case. When the intensity of white noise is large, white noise controls this system. This means that the disease will extinct exponentially regardless of the magnitude of .

Suggested Citation

  • Yuguo Lin & Daqing Jiang, 2013. "Dynamics of a Multigroup SIR Epidemic Model with Nonlinear Incidence and Stochastic Perturbation," Abstract and Applied Analysis, Hindawi, vol. 2013, pages 1-12, July.
    • Handle: RePEc:hin:jnlaaa:917389
    DOI: 10.1155/2013/917389
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