A FRACTIONAL ORDER SEIR MODEL WITH DENSITY DEPENDENT DEATH RATE

A FRACTIONAL ORDER SEIR MODEL WITH DENSITY DEPENDENT DEATH RATE

In this paper, we introduce a fractional order SEIR epidemic model with vertical transmission, where the death rate of the population is density dependent, i.e., dependent on the population size. It is also assumed that there exists an infection related death rate. We show the existence of nonnegative solutions of the model, and also give a detailed stability analysis of disease free and positive fixed points. A numerical example is also presented

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  • Ahmed, E., El-Sayed, A. M. A. and El-Saka, H. A. A. On some Routh–Hurwitz conditions for fractional order differential equations and their applications in Lorenz, R¨ossler, Chua and Chen systems, Physics Letters A 358, 1–4, 2006.
  • Ahmed, E., El-Sayed, A. M. A. and El-Saka, H. A. A. Equilibrium points, stability and nu- merical solutions of fractional-order predator–prey and rabies models, JMAA 325, 542–553, 2007.
  • Brauer, F. and Castillo-Chavez, C. Mathematical Models in Population Biology and Epi- demiology(Springer-Verlag, New York, 2001).
  • Debnath, L. Recent applications of fractional calculus to science and engineering, IJMMS 54, 3413–3442, 2003. [5] Diethelm, K, Ford, N. J. and Freed, A. D. A predictor-corrector approach for the numerical solution of fractional differential equations, Nonlinear Dynamics 29, 3–22, 2002.
  • Ding, Y. and Ye, H. A Fractional-order differential equation model of HIV infection of CD4+T-cells, Mathematical and Computer Modeling 50, 386–392, 2009.
  • El-Sheikh, M. M. A. and El-Marouf, S. A. A. On stability and bifurcation of solutions of an SEIR epidemic model with vertical transmission, IJMMS 56, 2971–2987, 2004.
  • Hethcote, H. The mathematics of infectious diseases, SIAM Reviews 43 (4), 599–653, 2000. [9] Kermack, W. O. and McKendrick, A. G. Contributions to the mathematical theory of epi- demics, Bulletin of Mathematical Biology 53, 33–55, 1991.
  • Lin, W. Global existence theory and chaos control of fractional differential equations, JMAA 332, 709–726, 2007. [11] Matignon, D. Stability results for fractional differential equations with applications to control processing, in: Computational Eng. in Sys. Appl. 2 (Lille, France, 1996), p 963.
  • McCormack, R. K. and Allen, L. J. S. Disease emergence in multi-host epidemic models, Math. Medicine and Biology 24, 17–34, 2007.
  • Ngwa, G. A. and Shu, W. S. A mathematical model for endemic malaria with variable human and mosquito populations, Mathematical and Computer Modelling 32 (7-8), 747–763, 2000. [14] Odibat, Z. M. and Shawagfeh, N. T. Generalized Taylor’s formula, Applied Mathematics and Computation 186, 286–293, 2007.
  • Podlubny, I. Fractional Differential Equations (Academic Press, London, 1999).