Snark

From LifeWiki
Jump to: navigation, search
Snark
Snark 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-bit still life, the heart of the Snark, also known as the Petersen[2]. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the population and the bounding box.

The reaction was discovered by Dietrich Leithner about 1998, but it consumed another block.[3] 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.[4] 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. [5]

References

  1. Mike Playle (April 25, 2013). "Just the place for a Snark!". Retrieved on March 27, 2016.
  2. Freywa (June 8, 2013). "Re: Just the place for a Snark!". Retrieved on April 5, 2017.
  3. Adam P. Goucher (February 17, 2010). "Re: Incomplete search patterns - try to complete". Retrieved on May 8, 2013.
  4. Matthias Merzenich (April 25, 2013). "Re: Just the place for a Snark!". Retrieved on March 27, 2016.
  5. Dave Greene (June 8, 2013). "Re: Just the place for a Snark!". Retrieved on April 5, 2017.

External links