Bifurcation Analysis of an SIR Model with Logistic Growth, Nonlinear Incidence, and Saturated Treatment

Figure 4

(a) Graph of as a function of : a Hopf bifurcation occurs at the point where changes sign. (b) Hopf bifurcation diagram of the system, showing the size of the stable (green) and unstable (blue) limit cycles that coalesce and disappear as is varied.

(a)

(b)