Schema Redescription in Cellular Automata: Revisiting Emergence in Complex Systems

Details Schema Redescription in Cellular Automata: Revisiting Emergence in Complex Systems Schema Redescription in Cellular Automata: Revisiting Emergence in Complex Systems

2011-02-08

arxiv.org/abs/1102.1691v2

The 2011 IEEE Symposium on Artificial Life, at the IEEE Symposium Series on Computational Intelligence 2011. April 11 - 15, 20

Nonlinear Sciences

Cellular Automata and Lattice Gases

paper submitted to the 2011 IEEE Symposium on Artificial Life

Scientific paper

We present a method to eliminate redundancy in the transition tables of Boolean automata: schema redescription with two symbols. One symbol is used to capture redundancy of individual input variables, and another to capture permutability in sets of input variables: fully characterizing the canalization present in Boolean functions. Two-symbol schemata explain aspects of the behaviour of automata networks that the characterization of their emergent patterns does not capture. We use our method to compare two well-known cellular automata for the density classification task: the human engineered CA GKL, and another obtained via genetic programming (GP). We show that despite having very different collective behaviour, these rules are very similar. Indeed, GKL is a special case of GP. Therefore, we demonstrate that it is more feasible to compare cellular automata via schema redescriptions of their rules, than by looking at their emergent behaviour, leading us to question the tendency in complexity research to pay much more attention to emergent patterns than to local interactions.

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