Publications (419) View all
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Article: Adaptive tag switching reinforces the coevolution of contingent cooperation and tag diversity.
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ABSTRACT: Most of previous studies concerning the similarity-based interaction have assumed that the change of tags just happens in the imitation stage. Individuals actually can adjust their tags whenever the environments related to these tags grow nasty. We institute a spatial model to investigate the effect of the coevolution of tag and strategy on the evolution of cooperation in the context of the Prisoner's Dilemma game. Interactions just happen between tag-identical neighbors. Individuals exploited by defectors change their current tags at a certain cost. The time-scale ratio controls how fast interaction happens relatively to selection. Results show that whenever individuals have enough chance to adapt to the environment, cooperation is greatly improved even for quite large temptation to defect. Intensive exploration reveals that both little and large costs of tag switching can further favor the establishment of cooperation. Our work may add more into the literature concerning games on adaptive networks.Journal of Theoretical Biology 04/2013; · 2.21 Impact Factor -
Article: Interpretations arising from Wrightian and Malthusian fitness under strong frequency dependent selection
Ecology and Evolution. 04/2013; -
Dataset: Interpretations arising from Wrightian and Malthusian fitness under strong frequency dependent selection
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Article: Adaptive role switching promotes fairness in networked ultimatum game.
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ABSTRACT: In recent years, mechanisms favoring fair split in the ultimatum game have attracted growing interests because of its practical implications for international bargains. In this game, two players are randomly assigned two different roles respectively to split an offer: the proposer suggests how to split and the responder decides whether or not to accept it. Only when both agree is the offer successfully split; otherwise both get nothing. It is of importance and interest to break the symmetry in role assignment especially when the game is repeatedly played in a heterogeneous population. Here we consider an adaptive role assignment: whenever the split fails, the two players switch their roles probabilistically. The results show that this simple feedback mechanism proves much more effective at promoting fairness than other alternatives (where, for example, the role assignment is based on the number of neighbors).Scientific Reports 03/2013; 3:1550. -
Article: The triangle-free graphs with rank 6
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ABSTRACT: The rank of a graph G is defined to be the rank of its adjacency matrix A(G). In this paper we characterize all connected triangle-free graphs with rank 6.01/2013;
