Long boat
| Long boat | |||||||||
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 7 | ||||||||
| Bounding box | 4 × 4 | ||||||||
| Frequency class | 6.6 | ||||||||
| Static symmetry | Unspecified | ||||||||
| Discovered by | JHC group | ||||||||
| Year of discovery | 1970 | ||||||||
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Long boat is a 7-cell still life that is an extensible longer version of a boat. It was found by the JHC group in 1970.[1]
Commonness
The long boat is the eighth most common still life in Achim Flammenkamp's census, being less common than ship but more common than ship-tie.[2]
Long boat is the eighth most common still life on Adam P. Goucher's Catagolue, being less common than pond but more common than ship-tie. Among all still lifes with 7 cells, it is the second most common, being less common than loaf but more common than eater 1.[3] It is also the tenth most common object overall on Catagolue.
Glider synthesis
Long boat can be constructed using only 3 gliders; its first glider synthesis was found by John Abbott.[4] There are multiple ways to synthesize a long boat using three gliders, two of which involve a glider hitting a beehive or loaf in a synchronized way only possible if the beehive or loaf had just formed. This can be useful in soup-based glider syntheses, as the beehive/loaf (predecessor) can sometimes be synthesized together with another object more cheaply than synthesizing the two separately.[5]
Gallery
| Two six-cell predecessors of the long boat (click above to open LifeViewer) RLE: here Plaintext: here |
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
- ↑ "Life Credits". Mark D. Niemiec. Retrieved on June 12, 2011.
- ↑ MathAndCode (December 12, 2020). Re: Still Life Synthesis Thread (discussion thread) at the ConwayLife.com forums
External links
- Long boat at the Life Lexicon
- The 4 seven-bit still-lifes at Mark D. Niemiec's Life Page
| 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 |
- Patterns
- Patterns with Catagolue frequency class 6
- Natural periodic objects
- Periodic objects with minimum population 7
- Patterns with 7 cells
- Patterns found by JHC group
- Patterns found in 1970
- Patterns that can be constructed with 3 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 7 cells
- Patterns with bilateral diagonal symmetry