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. 2002 Apr 2;99(7):4748–4751. doi: 10.1073/pnas.032086299

Figure 2.

Figure 2

The frequency of the pure strategy “rock” vs. time with ɛx + ɛy < 0 (ɛx = −0.1, ɛy = 0.05). The trajectory is attracted to a heteroclinic cycle at the boundary of the simplex. The duration of the intervals spent near each pure strategy increases linearly with time.