Period-24 glider gun
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| True period 24 gun | |||||
| View static image | |||||
| Pattern type | Gun | ||||
|---|---|---|---|---|---|
| Number of cells | 335 | ||||
| Bounding box | 43 × 32 | ||||
| Period | 24 | ||||
| Barrels | 1 | ||||
| Discovered by | Noam Elkies | ||||
| Year of discovery | 1997 | ||||
| |||||
Period-24 glider gun is a true period 24 gun discovered by Noam D. Elkies in 1997.[1] It uses four large period 4 oscillators (two of them variants of fountain, the other two adjoined by common casing) to hassle two T-tetrominos, which react together to produce gliders. The form on the right is a reduced variant found by Karel Suhajda.[2] The eater 1 can be replaced with a unix for compacting purposes, such as in the period-48 glider gun.
No more than five days after the initial discovery, Elkies found a method to double the period of the gun, resulting in the first known period 48 glider gun.[1] A smaller version was found in 2016 by Tanner Jacobi, using Rich's p16 to double the period.[3]
Image gallery
.png) Original period 24 glider gun. |
 Period 48 glider gun. |
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See also
External links
- Period-24 glider gun at the Life Lexicon
References
- ↑ 1.0 1.1 Paul Callahan (February 11, 2001). "p24 "true" gun (mail digest)". Retrieved on March 17, 2016.
- ↑ Jason Summers (December 30, 2012). "Pattern Collections, jslife/osc". Retrieved on March 17, 2016.
- ↑ Tanner Jacobi (2016-07-05). "Re: Soup search results". ConwayLife.com forums. Retrieved on 2016-07-05.