Difference between revisions of "Kickback reaction"
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Revision as of 00:03, 30 March 2019
| Kickback reaction | |||||||
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| Pattern type | Miscellaneous | ||||||
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| Number of cells | 10 | ||||||
| Bounding box | 8 × 5 | ||||||
| Discovered by | Unknown | ||||||
| Year of discovery | Unknown | ||||||
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A kickback reaction is a collision of two gliders resulting in a single glider travelling in the opposite direction to one of the original gliders. This is important in the proof of the existence of a universal constructor, and in Bill Gosper's total aperiodic, as well as a number of other constructions.
Besides the 90-degree collision shown here, one other two-glider collision with gliders meeting at 180 degrees also produces a clean output glider, and may also be called a "kickback reaction". This reaction is occasionally useful in glider syntheses. However, it is rarely used in signal circuitry or in self-supporting patterns like the Caterpillar or Centipede, because 90-degree collisions are generally much easier to arrange.
External links
- Kickback reaction at the Life Lexicon