Yang, Dong-Ping; Shuai, J.W.; Lin, Hai; Wu, Chen-Xu - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 13, pp. 2750-2756
We introduce a “gradient” to find out the defectors, and further a “topology potential” to characterize the individual’s strategy preference in the prisoner’s dilemma on scale-free networks. It is shown that the cooperators typically locate on the nodes with high topology potential...