Emergent Criticality from Co-evolution in Random Boolean Networks

Details Emergent Criticality from Co-evolution in Random Boolean Networks Emergent Criticality from Co-evolution in Random Boolean Networks

2006-04-30

arxiv.org/abs/cond-mat/0605020v3

Phys. Rev. E 74, 041910 (2006)

Physics

Condensed Matter

Statistical Mechanics

6 pages and 6 figures

Scientific paper

10.1103/PhysRevE.74.041910

The co-evolution of network topology and dynamics is studied in an evolutionary Boolean network model that is a simple model of gene regulatory network. We find that a critical state emerges spontaneously resulting from interplay between topology and dynamics during the evolution. The final evolved state is shown to be independent of initial conditions. The network appears to be driven to a random Boolean network with uniform in-degree of two in the large network limit. However, for biologically realized network sizes, significant finite-size effects are observed including a broad in-degree distribution and an average in-degree connection between two and three. These results may be important for explaining properties of gene regulatory networks.

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