Snark: Difference between revisions
m Removed an invisible %E2%80%8E character at end of pname (!) |
Not necessary, really. I think it says on the eater page that it functions as a one-time reflector |
||
| Line 34: | Line 34: | ||
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 [[snark]] was discovered.]] | [[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.]] | ||
Revision as of 05:59, 14 February 2019
| Snark | |||||||||
| View static image | |||||||||
| Pattern type | Stable reflector | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 52 | ||||||||
| Bounding box | 23 × 17 | ||||||||
| Angle | 90° | ||||||||
| Repeat time | 43 | ||||||||
| Discovered by | Mike Playle | ||||||||
| Year of discovery | 2013 | ||||||||
| |||||||||
| |||||||||
The Snark is a 90° stable glider reflector discovered by Mike Playle in April 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