Cooperative scale-free networks despite the presence of defector hubs
Cooperative scale-free networks despite the presence of defector hubs
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DOI：
10.1209/0295-5075/88/38003
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发表时间：
2009-11-01
期刊：
影响因子：
1.8
通讯作者：
Sanchez, A.
中科院分区：
文献类型：
--
作者：
Poncela, J.;Gomez-Gardenes, J.;Sanchez, A.
最近的研究结果表明，异质种群更适合支持合作比同质设置时，囚徒困境驱动系统的进化动力学。当网络增长与进化动力学共同进化时，也会发生同样的情况，这也会产生高度合作的无标度网络。然而，在后一种情况下，合作的组织与基础网络是静态的情况完全不同。在本文中，我们研究了静态网络的合作结构与进化动力学一起成长，并表明，一般的信念，枢纽只能被合作者不持有。此外，这些无标度网络支持高水平的合作，尽管有叛逃者枢纽。我们的研究结果对解释无标度网络中的合作行为具有重要意义，并强调了复杂系统的形成对其功能的重要性。版权所有（C）EPLA，2009
Recent results have shown that heterogeneous populations are better suited to support cooperation than homogeneous settings when the Prisoner's Dilemma drives the evolutionary dynamics of the system. The same occurs when the network growth is coevolving together with the evolutionary dynamics, which also gives rise to highly cooperative scale-free networks. In the latter case, however, the organization of cooperation is radically different with respect to the case in which the underlying network is static. In this paper we study the structure of cooperation in static networks grown together with evolutionary dynamics and show that the general belief that hubs can only be occupied by cooperators does not hold. Moreover, these scale-free networks support high levels of cooperation despite having defector hubs. Our results have several important implications for the explanation of cooperative behavior in scale-free networks and highlight the importance that the formation of complex systems have on its function. Copyright (C) EPLA, 2009