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 | ||||||||||
| Discovered by | JHC group | ||||||||||
| Year of discovery | 1970 | ||||||||||
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Long boat is a longer version of a boat that was discovered by the JHC group in 1970.[1]
It can be trivially extended to form longer versions of the boat.
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]. It is also the tenth most common object on Adam P. Goucher's Catagolue. It is the second most common 7-bit still life, being less common than the loaf but more common than eater 1.[3]
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 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]
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
- Long boat at Adam P. Goucher's Catagolue
- 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 6.6
- Natural periodic objects
- 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
- Periodic objects with minimum population 7
- Patterns with bilateral diagonal symmetry
