Long barge

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Long barge
x = 5, y = 5, rule = B3/S23 bo$obo$bobo$2bobo$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 48 ]]
Pattern type Strict still life
Number of cells 8
Bounding box 5 × 5
Frequency class 11.8
Discovered by JHC group
Year of discovery 1970

Long barge is an 8-cell still life discovered by the JHC group in 1970.[1] It is a long extension of a barge.

It can "eat" two domino sparks, such as those produced by pentadecathlon; said sparks can be replaced with blocks to form unix.

Commonness

Main article: List of common still lifes

Long barge is the fourteenth most common still life on Adam P. Goucher's Catagolue, being less common than eater 1 but more common than aircraft carrier. Among all still lifes with 8 cells, it is the third most common, being less common than mango but more common than long ship.[2]It is also the nineteenth most common object overall on Catagolue. In Achim Flammenkamp's census, the long barge was also ranked fourteenth most common, again between eater 1 and aircraft carrier.[3]

Occurrence

The barge is 7.5 times as common as the long barge, but the long barge is 12,000 times as common as the very long barge. In diagonal symmetries (including 8-fold symmetry), the long barge is the eleventh most common object, which makes it more common than the barge. Reactions which form the long barge are demonstrated below.

x = 18, y = 18, rule = B3/S23 b2o8b2o$o2bo6bo2bo$o2bo6bo2bo$b2o2b3o3b2o3b2o$4bo10bo$3bo10bo$3bo9bo$ 3bo9bo3$b2o8b2o$o2bo6bo2bo$o2bo6bo2bo$b2o2b3o3b2o2b2o$4bo9bo2bo$3bo9bo $3bo9bo$4bo9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 AUTOSTART T 0 PAUSE 3 T 7 PAUSE 2 LOOP 8 ]]
Long barges are usually formed in a symmetric or near-symmetric active reaction hitting a pond
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RLE: here Plaintext: here

Glider synthesis

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.

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 March 30, 2010.

External links

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