The dynamics of competitive learning: the role of updates and memory

Details The dynamics of competitive learning: the role of updates and memory The dynamics of competitive learning: the role of updates and memory

2011-05-03

arxiv.org/abs/1105.0523v3

Phys. Rev. E 85, 011134 (2012)

Physics

Physics and Society

Scientific paper

10.1103/PhysRevE.85.011134

We examine the effects of memory and different updating paradigms in a game-theoretic model of competitive learning, where agents are influenced in their choice of strategy by both the choices made by, and the consequent success rates of, their immediate neighbours. We apply parallel and sequential updates in all possible combinations to the two competing rules, and find, typically, that the phase diagram of the model consists of a disordered phase separating two ordered phases at coexistence. A major result is that the corresponding critical exponents belong to the generalised universality class of the voter model. When the two strategies are distinct but not too different, we find the expected linear response behaviour as a function of their difference.Finally, we look at the extreme situation when a superior strategy, accompanied by a short memory of earlier outcomes, is pitted against its inverse; interestingly, we find that a long memory of earlier outcomes can occasionally compensate for the choice of a globally inferior strategy.

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