'Life' not critical?
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SIR - Bak et al. have presented evidence that the cellular automaton, the 'game of life', develops into a self-organized critical state, characterized by a D(T)^(-1.6) distribution of times T required for the lattice to return to equilibrium following a random
single-site perturbation. This power law implies an infinite expected equilibration time .
[1] P. Bak,et al. Self-organized criticality in the 'Game of Life" , 1989, Nature.
[2] Hwa,et al. Dissipative transport in open systems: An investigation of self-organized criticality. , 1989, Physical review letters.
[3] P. Bak,et al. Self-organized criticality. , 1988, Physical review. A, General physics.
[4] Janko Gravner,et al. Threshold-range scaling of excitable cellular automata , 1991, patt-sol/9304001.