Figure 4
From: When agreement-accepting free-riders are a necessary evil for the evolution of cooperation

No mixed states are formed in repeated games. Acceptors reduce cooperation in the absence of noise. Composition of the recurrent sets for repeated games without forgiveness. Strategies represented as in Fig. 1 for RC and PC repeated games for different values of α. Different pies for a given game stand for different attractors. We assumed \(\epsilon \) = 0.25 and δ = 4.