The Stability of SI Epidemic Model in Complex Networks with Stochastic Perturbation

Figure 4

(a), (b) 𝜆=0.05, 𝜎_𝑘1=0.015, 𝜎_𝑘2=0.05, 𝑃(𝑘)=𝑚^𝑘exp(−𝑚)/𝑘!, 𝑚=6, 𝑅₀=0.94.9≤1. (c), (d)    𝜆=0.025, 𝜎_𝑘1=0.01, 𝜎_𝑘2=0.1, 𝑃(𝑘)=2𝑚²𝑘⁻³, 𝑚=3, 𝑅₀=0.9071≤1.

(a)

(b)

(c)

(d)