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arXiv physics/0701315physics.soc-ph
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有限种群中三种策略的进化博弈动力学

Evolutionary game dynamics with three strategies in finite populations

Jing Wang, Feng Fu, Long Wang, Guangming Xie

摘要:

在有限种群Moran过程框架下,提出了一个具有$A$、$B$和$C$三种策略的演化博弈模型.该模型可以被描述为一个随机过程,可以从线性方程组数值计算。此外,为了捕捉进化过程的特征,我们定义了两个基本变量,{ \em全局}和{ \em局部}固定概率。如果策略$A$的{ \em global}注视概率超过中性注视概率,则无论$B$与$C$的初始比率是多少,选择都倾向于用$A$替换$B$或$C$。类似地,如果$A$的{ \em局部}注视概率超过中性注视概率,则选择倾向于用$A$代替$B$或仅以$B$与$C$的某些适当初始比率来代替$C$。此外,利用我们的模型,著名的游戏与AllC,AllD和TFT进行了分析。同时,我们发现在适当的条件下,单个TFT可以入侵整个种群。

英文摘要:

We propose a model for evolutionary game dynamics with three strategies $A$, $B$ and $C$ in the framework of Moran process in finite populations. The model can be described as a stochastic process which can be numerically computed from a system of linear equations. Furthermore, to capture the feature of the evolutionary process, we define two essential variables, the {\em global} and the {\em local} fixation probability. If the {\em global} fixation probability of strategy $A$ exceeds the neutral fixation probability, the selection favors $A$ replacing $B$ or $C$ no matter what the initial ratio of $B$ to $C$ is. Similarly, if the {\em local} fixation probability of $A$ exceeds the neutral one, the selection favors $A$ replacing $B$ or $C$ only in some appropriate initial ratios of $B$ to $C$. Besides, using our model, the famous game with AllC, AllD and TFT is analyzed. Meanwhile, we find that a single individual TFT could invade the entire population under proper conditions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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