R2-D2
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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.
Elkies' R2D2 stator from 1994 (which inspired the name)
See also
External links
- R2-D2 at the Life Lexicon
- 29P8.2 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 29 cells
- Periodic objects with minimum population 29
- Patterns with 29 cells
- Patterns found by Peter Raynham
- Oscillators
- 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