Survival and Stationary Distribution in a Stochastic SIS Model

Figure 4

The solution of the stochastic system (2) and its histogram with initial value (𝑆(0),𝐼(0))=(1.9,1.9). Here Λ=2, 𝜆=0.4, 𝜇=0.4, 𝜖=0.2, and 𝛾=0.2; 𝜎₁=0.05, 𝜎₂=0.05, and 𝜎₃=0.05.

(a)

(b)