Skip to main content
Advertisement

< Back to Article

Population Structure Induces a Symmetry Breaking Favoring the Emergence of Cooperation

Figure 4

Gradients of selection G(x).

a) Under the CPD paradigm, Scale-free networks lead to the appearance of an unstable equilibrium x* (open circles) and a scenario characteristic of a coordination game, paving the way for cooperator dominance for frequencies above x*. b) Under DPD, G(x) becomes positive for (almost) all values of x (x*<0.004 for F = 1.50 and x*<0.006 for F = 1.25), leading to a scenario characteristic of a Harmony game, where cooperators dominate unconditionally. In both panels the networks employed had 500 nodes and an average degree z = 4, whereas β = 10.0.

Figure 4

doi: https://doi.org/10.1371/journal.pcbi.1000596.g004