Universal role of migration in the evolution of cooperation  

作　　者：YANG HanXin WANG BingHong 

机构地区：[1]Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China [2]Research Center for Complex System Science, University of Shanghai for Science and Technology and Shanghai Academy of System Science, Shanghai 200093, China

出　　处：《Chinese Science Bulletin》2011年第34期3693-3696,共4页

基　　金：supported by the National Basic Research Program of China (2006CB705500);the National Important Research Project (91024026);the National Natural Science Foundation of China (10795016,10635040,11005001);the Specialized Research Fund for the Doctoral Program of Higher Education of China(20093402110032)

摘　　要：<Abstract>We study the role of unbiased migration in cooperation in the framework of the spatial evolutionary game on a variety of spatial structures, namely a regular lattice, continuous plane and complex networks. A striking finding is that migration plays a universal role in cooperation, regardless of the spatial structure. For a high degree of migration, cooperators cannot survive owing to their failure to form cooperator clusters that resist attacks by defectors. Meanwhile, for a low degree of migration, cooperation is considerably enhanced relative to that in the static spatial game, which is due to the strengthening of the boundaries of cooperator clusters by the occasional accumulation of cooperators along the boundaries. The cooperator cluster thus becomes more robust than that in the static game and defectors near the boundary can be assimilated by cooperators. The cooperator cluster thus expands, which facilitates cooperation. The general role of migration will be substantiated by sufficient simulations relating to heuristic explanations.We study the role of unbiased migration in cooperation in the framework of the spatial evolutionary game on a variety of spatial structures, namely a regular lattice, continuous plane and complex networks. A striking finding is that migration plays a universal role in cooperation, regardless of the spatial structure. For a high degree of migration, cooperators cannot survive owing to their failure to form cooperator clusters that resist attacks by defectors. Meanwhile, for a low degree of migration, cooperation is considerably enhanced relative to that in the static spatial game, which is due to the strengthening of the boundaries of cooperator clusters by the occasional accumulation of cooperators along the boundaries. The cooperator cluster thus becomes more robust than that in the static game and defectors near the boundary can be assimilated by cooperators. The cooperator cluster thus expands, which facilitates cooperation. The general role of migration will be substantiated by sufficient simulations relating to heuristic explanations.

关 键 词：迁移 合作 通用 进化 空间结构 演化博弈 网络空间 静态空间 

分 类 号：Q11[生物学—普通生物学] O225[理学—运筹学与控制论]