Difference between revisions of "Period-24 glider gun"
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{{Gun | {{Gun | ||
|name = | |name = Period-24 glider gun | ||
|pname = trueperiod24gun | |pname = trueperiod24gun | ||
|c = 335 | |c = 335 | ||
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|discoverer = Noam Elkies | |discoverer = Noam Elkies | ||
|discoveryear = 1997 | |discoveryear = 1997 | ||
|plaintext = true | |||
|rle = true | |rle = true | ||
|viewerconfig = #C [[ ZOOM 8 AUTOSTART OFF ]] | |||
}} | }} | ||
'''Period-24 glider gun''' is a [[Gun#True-period_guns|true period]] 24 [[gun]] discovered by [[Noam Elkies|Noam D. Elkies]] in [[:Category:Patterns found in 1997|1997]].<ref name="callahan">{{cite web|url=http://www.radicaleye.com/lifepage/patterns/p24gun/p24gun.html|title=p24 "true" gun (mail digest)|author=Paul Callahan|date=February 11, 2001|accessdate=March 17, 2016}}</ref> It uses four large [[period]] [[:Category:oscillators with period 4|4]] [[oscillator]]s (two of them variants of [[fountain]], the other two adjoined by common [[casing]]) to hassle two [[T-tetromino]]s, which react together to produce gliders. The form on the right is a reduced variant found by Karel Suhajda.<ref name="jslife">{{cite web|url=http://entropymine.com/jason/life/|title=Pattern Collections, jslife/osc |author=Jason Summers|date=December 30, 2012|accessdate=March 17, 2016}}</ref> The eater 1 can be replaced with a [[unix]] for compacting purposes, such as in the [[period-48 glider gun]]. | '''Period-24 glider gun''' is a [[Gun#True-period_guns|true period]] 24 [[gun]] discovered by [[Noam Elkies|Noam D. Elkies]] in [[:Category:Patterns found in 1997|1997]].<ref name="callahan">{{cite web|url=http://www.radicaleye.com/lifepage/patterns/p24gun/p24gun.html|title=p24 "true" gun (mail digest)|author=Paul Callahan|date=February 11, 2001|accessdate=March 17, 2016}}</ref> It uses four large [[period]] [[:Category:oscillators with period 4|4]] [[oscillator]]s (two of them variants of [[fountain]], the other two adjoined by common [[casing]]) to hassle two [[T-tetromino]]s, which react together to produce gliders. The form on the right is a reduced variant found by Karel Suhajda.<ref name="jslife">{{cite web|url=http://entropymine.com/jason/life/|title=Pattern Collections, jslife/osc |author=Jason Summers|date=December 30, 2012|accessdate=March 17, 2016}}</ref> The eater 1 can be replaced with a [[unix]] for compacting purposes, such as in earlier versions of 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.<ref name="callahan" /> A smaller version was found in 2016 by Tanner Jacobi, using [[Rich's p16]] to double the period.<ref name="jacobi">{{cite web|title=Re: Soup search results|author=Tanner Jacobi|date=2016-07-05|accessdate=2016-07-05|work=ConwayLife.com forums|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1452&start=1075#p32769}}</ref> | 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.<ref name="callahan" /> A smaller version was found in 2016 by Tanner Jacobi, using [[Rich's p16]] to double the period.<ref name="jacobi">{{cite web|title=Re: Soup search results|author=Tanner Jacobi|date=2016-07-05|accessdate=2016-07-05|work=ConwayLife.com forums|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1452&start=1075#p32769}}</ref> | ||
== | In early 2019 a smaller period-24 gun was [http://www.conwaylife.com/forums/viewtopic.php?p=67805#p67805 assembled by Tanner Jacobi and Matthias Merzenich], based on the [[dueling banjos]] oscillator (see animation below). | ||
==Gallery== | |||
{| | {| | ||
|- | |- | ||
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{{EmbedViewer | {{EmbedViewer | ||
|viewerconfig = #C [[ GPS 24 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 4 HEIGHT 480 ]] | |viewerconfig = #C [[ GPS 24 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 4 HEIGHT 480 ]] | ||
|pname = | |pname = p24lwss | ||
|caption = A p24 [[LWSS]] gun, used in [[broken lines]].<br> | |caption = A p24 [[LWSS]] gun, used in [[broken lines]].<br> | ||
|position = left | |position = left | ||
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==See also== | ==See also== | ||
*[[Period-20 glider gun]] | |||
==References== | |||
<references/> | |||
==External links== | ==External links== | ||
{{LinkLexicon|lex_p.htm#p24gun}} | {{LinkLexicon|lex_p.htm#p24gun}} | ||
Revision as of 19:13, 7 July 2019
Period-24 glider 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 | ||||||
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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 earlier versions of 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]
In early 2019 a smaller period-24 gun was assembled by Tanner Jacobi and Matthias Merzenich, based on the dueling banjos oscillator (see animation below).
Gallery
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See also
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.
External links
- Period-24 glider gun at the Life Lexicon