Ship-tie
Ship-tie | |||||||||
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Pattern type | Strict still life | ||||||||
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Number of cells | 12 | ||||||||
Bounding box | 6 × 6 | ||||||||
Frequency class | 7.6 | ||||||||
Discovered by | Unknown | ||||||||
Year of discovery | Unknown | ||||||||
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Ship-tie (or half-fleet) is a 12-cell still life. The name "ship-tie" is derived from boat-tie, while "half-fleet" reflects the fact that ship-ties are almost always formed via predecessors of fleet, a constellation that is a pair of ship-ties.
Commonness
- Main article: List of common still lifes
Ship-tie is the ninth most common still life on Adam P. Goucher's Catagolue, being less common than long boat but more common than barge. Among all still lifes with 12 cells, it is the absolute most common, followed by mirrored table.[1]It is also the twelfth most common object overall on Catagolue, and is the most common object for which there exists no 2-glider or 3-glider synthesis.
In Achim Flammenkamp's census, the ship-tie was also ranked ninth most common, again between the long boat and barge.[2]
Compared to Catagolue's typical 16 × 16 soups, the ship-tie is 13% more common in 8 × 8 soups and 8% more common in 10 × 10 soups. This is because fleets take up a lot of room, and if it's the only constellation in the universe, it won't hit anything else that will destroy it.
Construction
There are 3-glider collisions that produce a ship-tie with junk that can be removed with another glider. Other 1-stage 4-glider collisions that make a clean ship-tie are also known and can be found in Mark Niemiec's glider synthesis database.
Some 2-stage 4-glider syntheses of a ship-tie (click above to open LifeViewer) RLE: here Plaintext: here |
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See also
References
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on November 8, 2009.
External links
- Ship-tie at the Life Lexicon
- Ship-tie at Adam P. Goucher's Catagolue
- The 121 twelve-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 12/12-3.rle)
- 12.41 at Heinrich Koenig's Game of Life Object Catalogs