Quad
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Quad | |||||||||||
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Pattern type | Oscillator | ||||||||||
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Oscillator type | Muttering moat | ||||||||||
Family | Barberpole | ||||||||||
Number of cells | 16 | ||||||||||
Bounding box | 6×6 | ||||||||||
Period | 2 | ||||||||||
Mod | 1 | ||||||||||
Heat | 8 | ||||||||||
Volatility | 0.40 | ||||||||||
Strict volatility | 0.40 | ||||||||||
Rotor type | Clock | ||||||||||
Discovered by | Robert Kraus | ||||||||||
Year of discovery | 1971 | ||||||||||
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Quad (or barberpole intersection[1]) is a period-2 oscillator and muttering moat that was found in April 1971 by Robert Kraus.[2] It has the same rotor as the clock. It and mold are the only flippers that fit inside a 6×6 bounding box; however, mold is period 4.
This oscillator first occurred naturally on December 28, 2015, in a soup submitted to Catagolue by Adam P. Goucher. A 12-glider synthesis was constructed the next day by Tanner Jacobi.[3]
See also
References
- ↑ Eric Weisstein. "Quad". Eric Weisstein's Treasure Trove of Life. Retrieved on May 1, 2009.
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Tanner Jacobi (December 29, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
- Quad at the Life Lexicon
- Quad at Adam P. Goucher's Catagolue
- 16P2.19 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 16 cells
- Patterns with 16 cells
- Patterns found by Robert Kraus
- Patterns found in 1971
- Patterns that can be constructed with 10 gliders
- Oscillators
- Periodic objects with minimum population 16
- Barberpole variants
- Muttering moats
- Oscillators with period 2
- Oscillators with mod 1
- Oscillators with heat 8
- Oscillators with volatility 0.40
- Oscillators with strict volatility 0.40
- Oscillators with rotor Clock
- Patterns with 90-degree rotation symmetry
- Flipping oscillators
- Natural periodic objects