Pure Saddle Points and Symmetric Relative Payoff Games

Details Pure Saddle Points and Symmetric Relative Payoff Games Pure Saddle Points and Symmetric Relative Payoff Games

2010-03-22

arxiv.org/abs/1003.4277v1

Computer Science

Computer Science and Game Theory

Scientific paper

It is well known that the rock-paper-scissors game has no pure saddle point. We show that this holds more generally: A symmetric two-player zero-sum game has a pure saddle point if and only if it is not a generalized rock-paper-scissors game. Moreover, we show that every finite symmetric quasiconcave two-player zero-sum game has a pure saddle point. Further sufficient conditions for existence are provided. We apply our theory to a rich collection of examples by noting that the class of symmetric two-player zero-sum games coincides with the class of relative payoff games associated with symmetric two-player games. This allows us to derive results on the existence of a finite population evolutionary stable strategies.

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