Figure 8. The stationary fraction of all cooperators, including C on G₁ and C, Q on G₂, on the whole two-layer coupled network as a function of α under different γ, given that the temptation of defect b takes different values.

(a–f) correspond to results of b being 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, respectively. Each data presented is the average of 100 realizations.