Barge

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Barge
x = 4, y = 4, rule = B3/S23 2bo$bobo$obo$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 57 ]]
Pattern type Strict still life
Number of cells 6
Bounding box 4 × 4
Frequency class 8.9
Static symmetry xk (D4_x4)
Discovered by JHC group
Year of discovery 1970
This article is about the 6-cell still life. For the extensible c/3 spaceship, see Barge (spaceship).

The barge is a common 6-cell still life discovered by the JHC group in 1970.[1] It is infinitely extensible, and can be seen as a long version of the tub.

Occurrence

See also: List of common still lifes, Most common objects on Catagolue

Barge is the tenth most common still life on Adam P. Goucher's Catagolue, being less common than ship-tie but more common than half-bakery. Among all still lifes with 6 cells, it is the third most common, being less common than ship but more common than aircraft carrier.[2] It is also the fourteenth most common object overall on Catagolue.

In Achim Flammenkamp's census, the barge was also ranked tenth most common, again between the ship-tie and half-bakery.[3]

x = 43, y = 9, rule = B3/S23 36bo$35bobo$34bobo$b3o31bo$o3bo$bo3bo35bo$5bo34bobo$4b2o33bobo$40bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 16 THUMBSIZE 2 ZOOM 12 ]]
Occasionally, a constellation of two barges aligned with each other can be seen.
It is produced by this sequence, which is ranked #408 in census.rle.
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Glider synthesis

Main article: Glider synthesis

All strict still lifes with a population of 23 or fewer cells, all oscillators with 16 or fewer cells, and all spaceships with 35 or fewer cells are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.

Extensibility

Barge can be infinitely extended, as illustrated by the following:

Long barge Very long barge Long^3 barge Long^4 barge Long^5 barge

See also

References

  1. ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
  2. ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
  3. ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on June 6, 2013.
Vessels
No corners (barges) (^-2) • (^-1) • ^0 • ^1 • ^2 • ^3
One corner (boats) (^-2) • (^-1) • ^0 • ^1 • ^2 • ^3
Two corners (ships) (^-1) • ^0 • ^1 • ^2 • ^3