Boat
The boat is the only still life with 5 cells and was discovered by the JHC group in 1970.[1] It can be thought of as a tub with an extra cell in one of the corners, or a ship with one of the corner cells removed. Like the tub and the ship, it is infinitely extensible (see long boat).
| Boat | |||||||||||
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| Pattern type | Strict still life | ||||||||||
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| Number of cells | 5 | ||||||||||
| Bounding box | 3×3 | ||||||||||
| Frequency class | 2.8 | ||||||||||
| Discovered by | JHC group | ||||||||||
| Year of discovery | 1970 | ||||||||||
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The boat can be hit by a glider to cleanly produce another glider, travelling perpendicular to the direction of the input glider. It is thus a one-time reflector.
Commonness
The boat is the fourth most common still life in Achim Flammenkamp's census, being slightly less common than loaf and over four times as common as tub.[2] It is also the sixth most common object on Adam P. Goucher's Catagolue.[3]
gollark: Not an "OS".
gollark: I think what you need is an "encrypted chat program".
gollark: I was talking Opus; I guess MBS somewhat counts but it isn't branded as an OS.
gollark: So very many new people make "OS"es. There is about *one* useful one?
gollark: Please cease "OS" production.
References
- Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
- Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
External links
- Boat at the Life Lexicon
- Boat at Adam P. Goucher's Catagolue
- The 1 five-bit still-life at Mark D. Niemiec's Life Page
| Vessels | |
|---|---|
| No corners (barges) | (^-2) • (^-1) • ^0 • ^1 • ^2 • ^3 • ^4 • ^5 • ^6 • ^7 • ^8 • ^9 |
| One corner (boats) | (^-2) • (^-1) • ^0 • ^1 • ^2 • ^3 • ^4 • ^5 • ^6 • ^7 • ^8 • ^9 • ^10 |
| Two corners (ships) | (^-1) • ^0 • ^1 • ^2 • ^3 • ^4 • ^5 • ^6 • ^7 • ^8 • ^9 • ^10 |
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