Glider (Conway's Life)
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The glider is a pattern in Conway's Game of Life that travels across the board. It was first discovered by Richard K. Guy. It is the smallest spaceship, and it travels diagonally at a speed of c/4. The glider is often produced from randomly-generated starting configurations.
Gliders are important to the Game of Life because they are easily produced, can be collided with each other to form more complicated objects, and can be used to transmit information over long distances.
Eric S. Raymond has proposed the glider as an emblem to represent hackers because:
