Long snake

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Long snake
x = 5, y = 3, rule = B3/S23 2o$obobo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 63 ]]
Pattern type Strict still life
Number of cells 7
Bounding box 5 × 3
Frequency class 18.4
Discovered by John Conway
Year of discovery 1970

Long snake (or python) is the first extension of the snake still life. It was found by John Conway no later than 1970 as part of an early still life enumeration,[1] although does not appear to have been published until 1971.[2]

Occurrence

See also: List of common still lifes

Long snake is the forty-third most common still life in Achim Flammenkamp's census, being less common than cis-boat with tail but more common than trans-mirrored bun.[3] This makes it the rarest of the four 7-bit still lifes in this census, over 200 times rarer than the second rarest, eater 1.

It is the 42nd most common still life on Adam P. Goucher's Catagolue, being less common than loop but more common than fourteener. It is the rarest still life with 7 cells, being 177 times rarer than eater 1.[4]

Construction

All strict still lifes with a population of 21 or fewer cells, all oscillators with 16 or fewer cells, and all spaceships with 31 or fewer cells are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.

See also

References

  1. Dave Greene (December 23, 2021). Re: Thread for basic questions (discussion thread) at the ConwayLife.com forums
  2. Robert Wainwright (September 1971). Lifeline, vol 3, page 2.
  3. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  4. Adam P. Goucher. "Statistics". Catagolue. Retrieved on May 5, 2023.

External links