Exact Solutions for Models of Cultural Transmission and Network Rewiring

Details Exact Solutions for Models of Cultural Transmission and Network Rewiring Exact Solutions for Models of Cultural Transmission and Network Rewiring

2006-08-04

arxiv.org/abs/physics/0608052v1

Physics

Physics and Society

13 pages, 6 figures. Accepted for ECCS 06 Oxford, September 2006

Scientific paper

We look at the evolution through rewiring of the degree distribution of a network so the number edges is constant. This is exactly equivalent to the evolution of probability distributions in models of cultural transmission with drift and innovation, or models of homogeneity in genes in the presence of mutation. We show that the mean field equations in the literature are incomplete and provide the full equations. We then give an exact solution for both their long time solution and for their approach to equilibrium. Numerical results show these are excellent approximations and confirm the characteristic simple inverse power law distributions with a large scale cutoff under certain conditions. The alternative is that we reach a completely homogeneous solution. We consider how such processes may arise in practice, using a recent Minority Game study as an example.

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