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A nonstandard finite difference scheme and optimal control for an HIV model with Beddington–DeAngelis incidence and cure rate

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Abstract

In this paper, we incorporate the Beddington–DeAngelis incidence rate to a continuous-time HIV infection model with cure rate and a full logistic proliferation rate of \(CD4^+\) T cells in both uninfected and infected cells. Equilibria and their local stability analysis are discussed. It is shown that the HIV-free equilibrium point is locally asymptotically stable if \({\mathcal {R}}_0<1\) and unstable if \({\mathcal {R}}_0\ge 1\), where \({\mathcal {R}}_0\) is the basic reproduction number. Whereas, the HIV equilibrium point is locally asymptotically stable if \({\mathcal {R}}_0>1\). A nonstandard finite difference method is applied to the continuous model to obtain its discrete counterpart. The scheme applied preserves the main features of the continuous model such as positivity, boundedness of the solutions, equilibria and their local stability. Moreover, an optimal control strategy is applied to the discrete-time model in order to reduce the number of infected cells as well as the number of free HIV particles. Numerical simulations are performed to verify the theoretical analysis obtained.

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The author would like to thank the anonymous reviewers for providing valuable comments which helped to improve the original manuscript.

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  1. Mathematics Department, Faculty of Education, Alexandria University, Alexandria, Egypt

    Sanaa Moussa Salman

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Salman, S.M. A nonstandard finite difference scheme and optimal control for an HIV model with Beddington–DeAngelis incidence and cure rate. Eur. Phys. J. Plus 135, 808 (2020). https://doi.org/10.1140/epjp/s13360-020-00839-1

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