Difference between revisions of "Period-24 glider gun"

From LifeWiki
Jump to navigation Jump to search
Line 21: Line 21:
 
|[[Image:P48-gun-smaller.png|framed|left|Period 48 glider gun.]]
 
|[[Image:P48-gun-smaller.png|framed|left|Period 48 glider gun.]]
 
|}
 
|}
 +
{{EmbedViewer
 +
|viewerconfig = #C [[ GPS 24 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 4 HEIGHT 480 ]]
 +
|pname        = p24LWSS
 +
|caption = A p24 LWSS gun, used in [[broken lines]].
 +
|position    = left
 +
}}
  
 
==See also==
 
==See also==

Revision as of 10:54, 27 November 2018

True period 24 gun
x = 43, y = 32, rule = B3/S23 23bo2bo$21b6o$17b2obo8bo$13b2obobobob8o2bo$11b3ob2o3bobo7b3o$10bo4b3o 2bo3bo3b2o$11b3o3b2ob4obo3bob2o$12bobo3bo5bo4bo2bo4b2obo$10bo8bob2o2b 2o2b2o5bob2obo$10b5ob4obo4b3o7bo4bo$15b2o4bo4bob3o2b2obob2ob2o$12b5ob 3o4b2ob2o3bobobobobo$11bo5b2o4b2obob2o5bo5bo$12b5o6b2obo3bo3bobob2ob2o $2ob2o9b2o2bo5bobo4bo2b3obobo$bobobobob2o3b3obo6bo2bobo4b3o2bo$o2bo7bo 6b2o3b3o8bobob2o$3o2bo4b2o11bo10bo$5b4obo17b2o4b2o$2b2obo6bo14bo3bo2b 2o$bo4bo3bo16bo6b2o$b3obo4bo16bo3bo2bo$11bo2bo3bo9b2o4bobob2o$b3obo4bo 8b2o3bo10b3o2bo$bo4bo3bo7bo6bo8b3obobo$2b2obo6bo10b3o8bobob2ob2o$5b4ob o24bo5bo$3o2bo4b2o21bobobobobo$o2bo7bo9b2o10b2obob2ob2o$bobobobob2o10b o8bo5bo4bo$2ob2o17b3o6bo4bob2obo$24bo4b3o5b2obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
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

Original period 24 glider gun.
Period 48 glider gun.
[[:RLE:P24LWSS]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 24 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 4 HEIGHT 480 ]]
A p24 LWSS gun, used in broken lines. (click above to open LifeViewer)
RLE: here Plaintext: here

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.