Top panel: time courses depicting the evolution of cooperation for different values of under the random distribution of strategies.

Abstract

<p>Note that the arrows denote the end of enduring (END) period and the beginning of expanding (EXP) period. Bottom panel: the evolution snapshots of different values of . From top to bottom, the values of are 0, 0.5, 1.0 and 2.0, respectively. The colore code is the same with <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0091012#pone-0091012-g002" target="_blank">Fig.2:</a> cooperator (red) and defector (blue). From left to right, the time steps are 0, 10, 100, 1000 for each value of .</p