Stability and Hopf bifurcation analysis for fractional-order SVEIR computer virus propagation model with nonlinear incident rate and two delays

This paper is concerned with the stability and Hopf bifurcation for a fractional-order Susceptible-Vacci nated-Exposed-Infectious-Recovered (SVEIR) computer virus propagation model with a nonlinear inci-dent rate. By employing the linearization technique and Routh-Hurwitz method, the sufficient criterion is established for the locally asymptotic stability of endemic equilibrium point. The Hopf bifurcation is also studied for the SVEIR computer virus model by taking time delay as the bifurcation parameter. The research results show that the stability and Hopf bifurcation of proposed model are significantly affected by both time delay and the order of the fractional derivative. Examples with proper parameters and several simulations are given to illustrate the validity of the theoretical results.& COPY; 2023 Elsevier B.V. All rights reserved.