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Notes

Chapter 9: Fundamental Physics

Section 11: Uniqueness and Branching in Time


String transformations

An example of a rule that allows one to go from any string of A's and B's to any other is

{"A"->"AA", "AA"->"A", "A"->"B", "B"->"A"}

(Compare page 1038.)


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