Figure 3

Continuous space: lattice distribution. Cooperation frequencies in the TS-plane. On the left, results achieved using agents provided with \(\bar{k(0)} = 4\). On the right, results achieved using agents provided with \(\bar{k(0)} = 8.\) In both cases, \(\bar{k(0)}\) refers to \(\bar{k(0)_{\rm in}}\) and \(\bar{k(0)_{\rm out}}.\) Parameter S indicates the payoff obtained by cooperators that face defectors that in turn gain a payoff equal to T (when facing cooperators)—see matrix 1. Colors indicate the averaged degree of cooperation achieved by the population. We recall that red indicates strong cooperation, while blue defection (i.e., no cooperation).