Snark: Difference between revisions
Copied RLE from RLE:Snarkcatalystvariants, looking for advice on how to standardize -- comments into caption, too, maybe? |
m experiment with caption for EmbedViewer |
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|position = center | |position = center | ||
|viewerconfig = #C [[ THEME 6 GRID GRIDMAJOR 0 ZOOM 8 HEIGHT 480 THUMBLAUNCH THUMBSIZE 2 ]] | |viewerconfig = #C [[ THEME 6 GRID GRIDMAJOR 0 ZOOM 8 HEIGHT 480 THUMBLAUNCH THUMBSIZE 2 ]] | ||
|rle = | |rle = | ||
x = 51, y = 52, rule = B3/S23 | x = 51, y = 52, rule = B3/S23 | ||
20b2o$20bobo$22bo4b2o$18b4ob2o2bo2bo$18bo2bobobobob2o$21bobobobo$22b2o | 20b2o$20bobo$22bo4b2o$18b4ob2o2bo2bo$18bo2bobobobob2o$21bobobobo$22b2o | ||
| Line 34: | Line 29: | ||
24bo$23bobob2o4b2o$23bobobobo2bo2bo$22b2obobobo3b2o$23bo2b2ob4o$23bo4b | 24bo$23bobob2o4b2o$23bobobobo2bo2bo$22b2obobobo3b2o$23bo2b2ob4o$23bo4b | ||
o3bo$24b3obo2bo$26bobobo$29bo! | o3bo$24b3obo2bo$26bobobo$29bo! | ||
|caption = four Snark catalyst variants --<br /><div align="left"> | |||
<pre>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 Ekstrom (better clearance on two diagonals)</pre></div> | |||
}} | }} | ||
Revision as of 18:30, 12 January 2018
| 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 | ||||||||
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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-bit still life, 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.
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 Ekstrom (better clearance on two diagonals) (click above to open LifeViewer) |
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.