Difference between revisions of "R2-D2"
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|isorulemin = B3eiy/S2cik3-jknq | |isorulemin = B3eiy/S2cik3-jknq | ||
|isorulemax = B2kn34-aejn5-jry6-ik78/S01c234-n5678 | |isorulemax = B2kn34-aejn5-jry6-ik78/S01c234-n5678 | ||
|synthesis = | |synthesis = 57 | ||
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|rle = true | |rle = true | ||
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|viewerconfig = #C [[ GPS 4 ZOOM 20 LOOP 8 ]] | |viewerconfig = #C [[ GPS 4 ZOOM 20 LOOP 8 ]] | ||
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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 {{year|1994}}, shown below. | '''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 {{year|1994}}, shown below.<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref> | ||
[[File:R2d2alternatestator.png|frame|center|Elkies' R2D2 stator from 1994 (which inspired the name)]] | [[File:R2d2alternatestator.png|frame|center|Elkies' R2D2 stator from 1994 (which inspired the name)]] | ||
Revision as of 14:56, 18 March 2020
| 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
- 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
- Patterns that can be constructed with between 50 and 59 gliders
- 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