Difference between revisions of "Fore and back"
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|name = Fore and back | |name = Fore and back | ||
|pname = foreandback | |pname = foreandback | ||
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|c = 24 | |c = 24 | ||
|bx = 7 | |bx = 7 | ||
Revision as of 13:32, 5 August 2016
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| Pattern type | Oscillator | ||||||||
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| Oscillator type | Billiard table | ||||||||
| Number of cells | 24 | ||||||||
| Bounding box | 7 × 7 | ||||||||
| Period | 2 | ||||||||
| Mod | 1 | ||||||||
| Heat | 4 | ||||||||
| Volatility | 0.15 | ||||||||
| Strict volatility | 0.15 | ||||||||
| Discovered by | Achim Flammenkamp | ||||||||
| Year of discovery | 1994 | ||||||||
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Fore and back (or complementary blinker) is a period 2 oscillator that was found by Achim Flammenkamp in July 1994. Its rotor is the same as the blinker.
Commonness
Fore and back is about the thirty-eighth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than boat on spark coil and griddle and block, about as common as 21P2, and more common than trans-block and long hook eating tub and trans-beacon down and long hook.[1]
Synthesis
In August, 2013 a 24-glider synthesis of this oscillator was found by Martin Grant, based on a soup, provided by Lewis Patterson. Several days later Mark Niemiec improved this result, having found a 20-glider synthesis.[2]
In October 2014, Tanner Jacobi found a predecessor for this pattern based on a soup from Adam P. Goucher's apgsearch script, which was eventually optimized to a 6-glider synthesis[3] in November.
See also
References
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ "Synthesising Oscillators". Retrieved on September 10, 2013.
- ↑ "Soup search results". Retrieved on November 9, 2014.
External links
- Fore and back at the Life Lexicon
- Patterns
- Oscillators with 24 cells
- Periodic objects with minimum population 24
- Patterns with 24 cells
- Patterns found by Achim Flammenkamp
- Patterns found in 1994
- Patterns that can be constructed with 20 gliders
- Oscillators
- Billiard tables
- Oscillators with period 2
- Oscillators with mod 1
- Oscillators with heat 4
- Oscillators with volatility 0.15
- Oscillators with strict volatility 0.15
- Patterns with 180-degree rotation symmetry
- Flipping oscillators