Punishment Effect of Prisoner Dilemma Game Based on a New Evolution Strategy Rule

Figure 12

The triangle line represents the fraction of cooperators in the network with 𝑏=1.55 for 𝛽=0.1, the square line represents the fraction of cooperators in the network for 𝛽=0.03, and the circle line represents the fraction of cooperators in the network for 𝛽=0.0015.