- Any live cell with fewer than two live neighbours dies, as if caused by under-population.
- Any live cell with two or three live neighbours lives on to the next generation.
- Any live cell with more than three live neighbours dies, as if by overcrowding.
- Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction.
http://programmers.stackexchange.com/questions/50175/conways-game-of-life-c which refers to Wikipedia:Gosper’s_algorithm and a google search suggests Gosper’s Algorithm (Hashlife), An explanation of how the hashlife algorithm reduces processing time and effort for cellular automata evaluation.
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