Pseudo-barberpole
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| Pseudo-barberpole | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Oscillator type | Muttering moat | ||||||||||
| Family | Barberpole | ||||||||||
| Number of cells | 15 | ||||||||||
| Bounding box | 12×12 | ||||||||||
| Period | 5 | ||||||||||
| Mod | 5 | ||||||||||
| Heat | 16.8 | ||||||||||
| Volatility | 0.82 | ||||||||||
| Strict volatility | 0.82 | ||||||||||
| Discovered by | Achim Flammenkamp | ||||||||||
| Year of discovery | 1994 | ||||||||||
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The pseudo-barberpole (or Achim's p5[1]) is a period 5 oscillator that was found by Achim Flammenkamp on August 22, 1994.[2] With a minimum population of 15 cells, it is the smallest known period 5 oscillator, followed by octagon 2 with 16 cells.[3][4] On October 23, 2002 Gabriel Nivasch found a period 5 oscillator that consists of four radially symmetrically arranged halves of the pseudo-barberpole.[5]
Synthesis
Goldtiger997 found a 16-glider synthesis based on a sample soup from Adam P. Goucher's Catagolue on April 22, 2017.[6] Martin Grant found an unrelated 13-glider synthesis that can also act as a component on June 20, 2018.[7]
Image gallery
See also
References
- ↑ "Achim's p5". The Life Lexicon. Stephen Silver. Retrieved on December 3, 2018.
- ↑ Dean Hickerson's oscillator stamp collection.
- ↑ Mark Niemiec (1998). "Life Period-5 Oscillators". Retrieved on February 15, 2009.
- ↑ "Class 2 Objects Catalog". Retrieved on March 14, 2009.
- ↑ Jason Summers' all-osc pattern collection.
- ↑ Goldtiger997 (2017-04-22). "Re: Soup search results". ConwayLife.com forums. Retrieved on 2017-04-23.
- ↑ "Synthesising Oscillators". Retrieved on October 24, 2018.
External links
- Pseudo-barberpole at the Life Lexicon
- 15P5.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 15 cells
- Patterns with 15 cells
- Patterns found by Achim Flammenkamp
- Patterns found in 1994
- Patterns that can be constructed with 13 gliders
- Oscillators
- Periodic objects with minimum population 15
- Barberpole variants
- Muttering moats
- Oscillators with period 5
- Oscillators with mod 5
- Oscillators with heat 16
- Oscillators with volatility 0.82
- Oscillators with strict volatility 0.82
- Patterns with bilateral diagonal symmetry
- Sparkers
- Sparkers with period 5
- Moderate sparkers
- Domino sparkers
- Semi-natural periodic objects
