Long ship
| Long ship | |||||||||
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 8 | ||||||||
| Bounding box | 4 × 4 | ||||||||
| Frequency class | 13.3 | ||||||||
| Discovered by | JHC group | ||||||||
| Year of discovery | 1970 | ||||||||
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Long ship is an 8-cell still life discovered by the JHC group in 1970[1] and is the first extension of ship.
Long ship is the smallest still life by bounding box for which there is no clean one-glider destruction. In terms of population it ties with canoe.[2]
Commonness
- Main article: List of common still lifes
Long ship is the seventeenth most common still life on Adam P. Goucher's Catagolue, being less common than paperclip but more common than integral sign. Among all still lifes with 8 cells, it is the fourth most common, being less common than long barge but more common than shillelagh.[3]It is also the twenty-fourth most common object overall on Catagolue.
Long ship was also the seventeenth most common still life in Achim Flammenkamp's census, being less common than paperclip, but more common than shillelagh.[4]
Occurrence
A long ship can be created when a traffic light predecessor hits a tub. By itself, it does not survive long, but it can survive in a soup if there are nearby active regions.
| The reaction described above (click above to open LifeViewer) RLE: here Plaintext: here |
Glider synthesis
There is a 3-glider collision that produces a constellation of a long ship and a blinker[5], leading to a two-stage 4-glider synthesis for the still life. Other 4-glider collisions that make a clean long ship are also known.
In other rules
Unlike the regular ship, this survives in HighLife (B36/S23) due to the lack of any B6 regions. Conversely, this dies in Grounded Life (B35/S23) due to the presence of a pair of B5 regions.
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
- ↑ gameoflifeboy (November 6, 2015). Re: Gustavo Ramos Rehermann's patterns (discussion thread) at the ConwayLife.com forums
- ↑ 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 January 15, 2009.
- ↑ xp2_6akoy17 at Adam P. Goucher's Catagolue (pseudo-object)
External links
- Long ship at the Life Lexicon
- Long ship at Adam P. Goucher's Catagolue
- The 9 eight-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 0/8lp.rle)
- Long ship at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 13
- Natural periodic objects
- Periodic objects with minimum population 8
- Patterns with 8 cells
- Patterns found by JHC group
- Patterns found in 1970
- Patterns that can be constructed with 4 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 8 cells
- Patterns with rectangular diagonal symmetry