Difference between revisions of "R2D2"

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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
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|synthesis        = 57
 
|plaintext        = true
 
|plaintext        = true
 
|rle              = true
 
|rle              = true
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|apgcode          = xp8_gg0s252s0ggz11078m87011
 
|apgcode          = xp8_gg0s252s0ggz11078m87011
 
|pentadecathlonid = 29P8.2
 
|pentadecathlonid = 29P8.2
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|viewerconfig    = #C [[ GPS 4 ZOOM 20 LOOP 8 ]]
 
}}
 
}}
'''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.
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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.<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)]]
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 +
[[Goldtiger997]] found a {{gliders|86}} [[synthesis]] for this oscillator on March 7, {{year|2020}}.<ref name="post90798" />
  
 
==See also==
 
==See also==
 
*[[Gray counter]]
 
*[[Gray counter]]
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==References==
 +
<references>
 +
<ref name="post90798">{{LinkForumThread
 +
|format = ref
 +
|title  = Re: Synthesising Oscillators
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|p      = 90798
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|author = Goldtiger997
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|date  = March 7, 2020
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}}</ref>
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</references>
  
 
==External links==
 
==External links==

Latest revision as of 14:56, 18 March 2020

R2D2
x = 11, y = 10, rule = B3/S23 5bo$4bobo$3bobobo$3bobobo$2obo3bob2o$2obo3bob2o$3bo3bo$3bobobo$4bobo$ 5bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 4 ZOOM 20 LOOP 8 ]]
Pattern type Oscillator
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

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

  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. Goldtiger997 (March 7, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums

External links

  • 29P8.2 at Heinrich Koenig's Game of Life Object Catalogs