Snark: Difference between revisions
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|discoverer = Mike Playle | |discoverer = Mike Playle | ||
|discoveryear = 2013 | |discoveryear = 2013 | ||
|synthesis = | |synthesis = 21 | ||
|synthesisRLE = true | |synthesisRLE = true | ||
|rulemin = B3/S23 | |rulemin = B3/S23 | ||
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|rle = true | |rle = true | ||
|viewerconfig = #C [[ WIDTH 600 HEIGHT 600 X 3 Y -3 THUMBSIZE 2 ZOOM 20 GPS 30 LOOP 128 ]] | |viewerconfig = #C [[ WIDTH 600 HEIGHT 600 X 3 Y -3 THUMBSIZE 2 ZOOM 20 GPS 30 LOOP 128 ]] | ||
|apgcode = xs49_wc9b88gy9o8zg88mlldxooy3321z11074zy5c453 | |||
}} | }} | ||
The '''Snark''' is a 90° [[Stable reflector|stable glider reflector]] discovered by [[Mike Playle]] | The '''Snark''' is a 90° [[Stable reflector|stable glider reflector]] discovered by [[Mike Playle]] on April 25, {{year|2013}}.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=7819#p7819|title=Just the place for a Snark!|author=Mike Playle|date=April 25, 2013|accessdate=March 27, 2016}}</ref> It is made up of two [[Eater_1|eaters]], a [[block]] and a [[31.4]], the "heart" of the Snark. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the [[population]] and the [[bounding box]]. Another commonly-used stabilization of the catalyst is 34 bits, and many other variants are available. For a color-changing one, see the reflector in the [[stable reflector]] article, or use a [[bouncer]] (periodic). | ||
{{EmbedViewer | {{EmbedViewer | ||
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}} | }} | ||
The base reaction was discovered by [[Dietrich Leithner]] about 1998, but it consumed another block.<ref>{{Cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=335#p1939|title=Re: Incomplete search patterns - try to complete|author=Adam P. Goucher|date=February 17, 2010|accessdate=May 8, 2013}}</ref> A [[catalyst]] that could replace the block was found with [[Bellman]], a program for searching catalytic reactions developed by [[Mike Playle]]. | The base reaction was discovered by [[Dietrich Leithner]] about {{year|1998}}, but it consumed another block.<ref>{{Cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=335#p1939|title=Re: Incomplete search patterns - try to complete|author=Adam P. Goucher|date=February 17, 2010|accessdate=May 8, 2013}}</ref> A [[catalyst]] that could replace the block was found with [[Bellman]], a program for searching catalytic reactions developed by [[Mike Playle]]. | ||
Given its small [[repeat time]], the snark made [[oscillator]]s of previously unknown periods of | Given its small [[repeat time]], the snark made [[oscillator]]s of previously unknown periods of {{period|43|brief}} and {{period|53|brief}} trivial.<ref>{{cite web|url= | ||
http://conwaylife.com/forums/viewtopic.php?p=7820#p7820|title=Re: Just the place for a Snark!|author=Matthias Merzenich|date=April 25, 2013|accessdate=March 27, 2016}}</ref> | http://conwaylife.com/forums/viewtopic.php?p=7820#p7820|title=Re: Just the place for a Snark!|author=Matthias Merzenich|date=April 25, 2013|accessdate=March 27, 2016}}</ref> | ||
It also made most large symmetrical Herschel-loop guns obsolete, since it is now possible to make use of the Herschel gliders with a shorter path of the Herschel track itself. <ref>{{cite web|url= | It also made most large symmetrical Herschel-loop guns obsolete, since it is now possible to make use of the Herschel gliders with a shorter path of the Herschel track itself. <ref>{{cite web|url= | ||
http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1082&start=25#p7901|title=Re: Just the place for a Snark!|author=Dave Greene|date=June 8, 2013|accessdate=April 5, 2017}}</ref> | http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1082&start=25#p7901|title=Re: Just the place for a Snark!|author=Dave Greene|date=June 8, 2013|accessdate=April 5, 2017}}</ref> | ||
[[File:p4_snark.png|200px|thumb|center|The [[period 4 reflector]] with repeat time 52 was used for p52+4n glider streams before the | [[File:p4_snark.png|200px|thumb|center|The [[period 4 reflector]] with repeat time 52 was used for p52+4n glider streams before the Snark was discovered.]] | ||
== References == | == References == | ||
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== External links == | == External links == | ||
{{LinkLexicon|lex_s.htm#snark}} | {{LinkLexicon|lex_s.htm#snark}} | ||
{{LinkCatagolue|xs49_wc9b88gy9o8zg88mlldxooy3321z11074zy5c453|format=pseudo-object}} | |||
Revision as of 22:58, 25 September 2019
| Snark | |||||||||||
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| Pattern type | Stable reflector | ||||||||||
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| Number of cells | 52 | ||||||||||
| Bounding box | 23 × 17 | ||||||||||
| Angle | 90° | ||||||||||
| Repeat time | 43 | ||||||||||
| Discovered by | Mike Playle | ||||||||||
| Year of discovery | 2013 | ||||||||||
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The Snark is a 90° stable glider reflector discovered by Mike Playle on April 25, 2013.[1] It is made up of two eaters, a block and a 31.4, the "heart" of the Snark. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the population and the bounding box. Another commonly-used stabilization of the catalyst is 34 bits, and many other variants are available. For a color-changing one, see the reflector in the stable reflector article, or use a bouncer (periodic).
four Snark catalyst variants --Top: original variant by Mike Playle Left: Shannon Omick (better clearance on a diagonal) Right: Heinrich Koenig (better clearance on a different diagonal) Bottom: Simon Ekström (better clearance on two diagonals) (click above to open LifeViewer) RLE: here Plaintext: here |
The base reaction was discovered by Dietrich Leithner about 1998, but it consumed another block.[2] A catalyst that could replace the block was found with Bellman, a program for searching catalytic reactions developed by Mike Playle.
Given its small repeat time, the snark made oscillators of previously unknown periods of 43 and 53 trivial.[3] It also made most large symmetrical Herschel-loop guns obsolete, since it is now possible to make use of the Herschel gliders with a shorter path of the Herschel track itself. [4]
References
- ↑ Mike Playle (April 25, 2013). "Just the place for a Snark!". Retrieved on March 27, 2016.
- ↑ Adam P. Goucher (February 17, 2010). "Re: Incomplete search patterns - try to complete". Retrieved on May 8, 2013.
- ↑ Matthias Merzenich (April 25, 2013). "Re: Just the place for a Snark!". Retrieved on March 27, 2016.
- ↑ Dave Greene (June 8, 2013). "Re: Just the place for a Snark!". Retrieved on April 5, 2017.
External links
- Snark at the Life Lexicon
- Snark at Adam P. Goucher's Catagolue (pseudo-object)