Permanence of an SIR epidemic model with density dependent birth rate and distributed time delay

Chun Hsien Li, Chiung Chiou Tsai, Suh Yuh Yang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In this paper, we investigate the permanence of an SIR epidemic model with a density-dependent birth rate and a distributed time delay. We first consider the attractivity of the disease-free equilibrium and then show that for any time delay, the delayed SIR epidemic model is permanent if and only if an endemic equilibrium exists. Numerical examples are given to illustrate the theoretical analysis. The results obtained are also compared with those from the analog system with a discrete time delay.

Original languageEnglish
Pages (from-to)1682-1693
Number of pages12
JournalApplied Mathematics and Computation
Volume218
Issue number5
DOIs
StatePublished - 1 Nov 2011

Keywords

  • Asymptotic stability
  • Permanence
  • SIR epidemic model
  • Time delay

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