IMAGES FROM THE BACK JACKET

A sequence of steps in the evolution of the rule 30 cellular automaton. (See page 24, page 27; see also Basic Images.)

Patterns produced by the evolution of two-dimensional totalistic cellular automata from a single black cell. (See page 551; see also page 174.)

Examples of ornamental art constructed according to definite rules. (See page 43; see also page 873.)
3500 BC (Sumerian), 9th century BC (Phoenician), 13th century (Italian), 13th century (English)

A two-dimensional cellular automaton on a square grid that shows approximately circular growth. (See page 178 and page 334; see also page 929.)

A two-dimensional cellular automaton on a square grid that shows approximately circular growth. (See page 178 and page 334; see also page 929.)

GCDs of pairs of numbers, with relative primality indicated with white. (See page 613; see also page 1093.)

The evolution of a simple multiway system. (See page 798; see also page 204ff.)