Period-24 glider gun

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True period 24 gun
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Pattern type Gun
Number of cells 335
Bounding box 43×32
Period 24
Barrels 1
Discovered by Noam Elkies
Year of discovery 1997

True period 24 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]

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

Original period 24 glider gun.
Period 48 glider gun.

See also

Period-20 glider gun

External links

References

  1. 1.0 1.1 Paul Callahan (February 11, 2001). "p24 "true" gun (mail digest)". Retrieved on March 17, 2016.
  2. Jason Summers (December 30, 2012). "Pattern Collections, jslife/osc". Retrieved on March 17, 2016.
  3. Tanner Jacobi (2016-07-05). "Re: Soup search results". ConwayLife.com forums. Retrieved on 2016-07-05.