T-nosed p4
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T-nosed p4 | |||||||||||
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Pattern type | Oscillator | ||||||||||
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Oscillator type | T-nose | ||||||||||
Number of cells | 31 | ||||||||||
Bounding box | 11×12 | ||||||||||
Period | 4 | ||||||||||
Mod | 4 | ||||||||||
Heat | 15 | ||||||||||
Volatility | 0.55 | ||||||||||
Strict volatility | 0.49 | ||||||||||
Discovered by | Robert Wainwright | ||||||||||
Year of discovery | 1989 | ||||||||||
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T-nosed p4 is a period-4 oscillator that was found in October 1989 by Robert Wainwright.[1] It can be used as a filter that deletes every other lightweight spaceship in a stream of period 4n + 2.[2] A smaller variant was posted by Tanner Jacobi on December 4, 2017,[3] and a 79-glider synthesis of said variant was found by Jacobi and Mark Niemiec on May 8, 2019.[4]
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See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ "Filter". The Life Lexicon. Stephen Silver. Retrieved on March 15, 2009.
- ↑ Tanner Jacobi (December 4, 2017). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
- ↑ Mark Niemiec (May 8, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
External links
- T-nosed p4 at the Life Lexicon
- 31P4.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 31 cells
- Patterns with 31 cells
- Patterns found by Robert Wainwright
- Patterns found in 1989
- Patterns that can be constructed with 52 gliders
- Oscillators
- Periodic objects with minimum population 31
- T-noses
- Oscillators with period 4
- Oscillators with mod 4
- Oscillators with heat 15
- Oscillators with volatility 0.55
- Oscillators with strict volatility 0.49
- Patterns with bilateral orthogonal symmetry
- Sparkers
- Sparkers with period 4
- Weak sparkers