R2D2
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| R2D2 | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Oscillator type | Billiard table | ||||||||||
| Number of cells | 29 | ||||||||||
| Bounding box | 11×10 | ||||||||||
| Period | 8 | ||||||||||
| Mod | 4 | ||||||||||
| Heat | 2.0 | ||||||||||
| Volatility | 0.22 | ||||||||||
| Strict volatility | 0.22 | ||||||||||
| Discovered by | Peter Raynham | ||||||||||
| Year of discovery | Unknown | ||||||||||
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R2D2 is a period-8 oscillator that was found in the form shown in the infobox at right, but not named, by Peter Raynham in the early 1970s. The name derives from a form with a larger and less symmetric stator discovered later by Noam Elkies in August 1994, shown below.[1]
Elkies' R2D2 stator from 1994 (which inspired the name)
Goldtiger997 found a 86-glider synthesis for this oscillator on March 7, 2020.[2]
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Goldtiger997 (March 7, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
External links
- R2D2 at the Life Lexicon
- R2D2 at Adam P. Goucher's Catagolue
- 29P8.2 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 29 cells
- Patterns with 29 cells
- Patterns found by Peter Raynham
- Patterns that can be constructed with 57 gliders
- Oscillators
- Periodic objects with minimum population 29
- Billiard tables
- Oscillators with period 8
- Oscillators with mod 4
- Oscillators with heat 2
- Oscillators with volatility 0.22
- Oscillators with strict volatility 0.22
- Patterns with bilateral orthogonal symmetry
- Flipping oscillators
