Chapter 6: Starting from Randomness

Section 6: Special Initial Conditions

Square root of rule 30

Although rule 30 cannot apparently be decomposed into other k=2, r=1 cellular automata, it can be viewed as the square of the k=3, r=1/2 cellular automata with rule numbers 11736, 11739 and 11742.

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From Stephen Wolfram: A New Kind of Science [citation]