Difference between revisions of "Light bulb"

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{{Oscillator
{{Oscillator
|name         = Light bulb
|name             = Light bulb
|pname       = lightbulb
|pname           = lightbulb
|f1           = Babbling brook
|f1               = Babbling brook
|f2           = Billiard table
|f2               = Billiard table
|c           = 23
|c               = 23
|bx           = 7
|bx               = 7
|by           = 9
|by               = 9
|p           = 2
|p               = 2
|m           = 2
|m               = 2
|h           = 3
|h               = 3
|v           = 0.12
|v               = 0.12
|rotor       = Filament
|rotor           = Filament
|discoveryear = 1971
|discoveryear     = 1971
|rulemin     = B3/S23
|rulemin         = B3/S23
|rulemax     = B378/S0123678
|rulemax         = B378/S0123678
|rulespecial = [[Conway's Game of Life|Conway Life]]
|rulespecial     = [[Conway's Game of Life|Conway Life]]
|isorulemin   = B3ij/S2-cn3ejnr
|isorulemin       = B3ij/S2-cn3ejnr
|isorulemax   = B2in34-ikrwy5-jqry6-in78/S01234-k5-e678
|isorulemax       = B2in34-ikrwy5-jqry6-in78/S01234-k5-e678
|synthesis   = 26
|synthesis       = 23
|synthesisRLE = true
|synthesis2      = 6
|plaintext   = true
|synthesisRLE     = true
|rle         = true
|plaintext       = true
|animated     = yes
|rle             = true
|apgcode     = xp2_3p606p3z0c95d
|animated         = yes
|viewerconfig = #C [[ GPS 2 ZOOM 20 LOOP 2 ]]
|pentadecathlonid = 23P2.760
|apgcode         = xp2_3p606p3z0c95d
|apgcode2        = xp2_03lkmzojc0cjo
|viewerconfig     = #C [[ HEIGHT 600 THUMBSIZE 3 ZOOM 30 GPS 2 LOOP 2 ]]
}}
}}
'''Light bulb''' is a {{period|2}} [[oscillator]] that was found in {{year|1971}}. Its [[rotor]], known as the '''filament''',<ref name="pddict" /> is the only known 3-[[cell]] period 2 rotor, and it can be embedded in a slightly smaller [[stator]], giving the {{cells|21}}-[[cell]] variant shown below. Two other variants of this oscillator are also known.<ref>{{cite web|url=http://www.pentadecathlon.com/rotors/rotors.php?page=3 |title=Period 2 Oscillator Rotors |accessdate=March 16, 2009}}</ref> Various other small [[induction coil]]s can also be used in place of the [[snake]] at the top of the bulb, including [[house]] and [[bookend]], (the latter of which has a known {{gliders|6}} [[synthesis]] for the resulting oscillator<ref>{{citeCatagolue|title=lightbulb_and_cis-hook|page=object/xp2_03lkmzojc0cjo/b3s23|accessdate=July 16, 2019}}</ref>) though these lead to larger [[bounding box]]es.
'''Light bulb''' is a {{period|2}} [[oscillator]] that was found in {{year|1971}}.<ref>{{CiteLifeline|vol=3|pages=page 3}}</ref><ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref> Its [[rotor]], known as the '''filament''',<ref name="pddict" /> is the only known 3-[[cell]] period 2 rotor, and it can be embedded in a slightly smaller [[stator]], giving the {{cells|21|text=21-cell}} variant shown below. Two other variants of this oscillator are also known.<ref>{{cite web|url=https://web.archive.org/web/20221101124052/http://pentadecathlon.com/rotors/rotors.php?page=3 |title=Period 2 Oscillator Rotors |accessdate=March 16, 2009}}</ref> Various other small [[induction coil]]s can also be used in place of the [[snake]] at the top of the bulb, including [[house]] and [[bookend]], (the latter of which has a known {{gliders|6}} [[Glider synthesis|synthesis]] for the resulting oscillator<ref>{{LinkCatagolue|xp2_03lkmzojc0cjo|style=nobullet}}</ref>) though these lead to larger [[bounding box]]es.


The first [[soup]]-based syntheses for this oscillator were discovered by [[Mark Niemiec]] on December 17, {{year|2004}} based on results from [[Andrzej Okrasinski's census]], costing {{gliders|11|brief}} gliders for the house-stabilized version and {{gliders|16|brief}} for the bookend-stabilized version.<ref>{{CiteSummersPattern|name=jslife|accessdate=January 5, 2020}}</ref>
First [[soup]]-based syntheses for this oscillator were discovered by [[Mark Niemiec]] on December 17, {{year|2004}} based on results from [[Andrzej Okrasinski's census]], costing {{gliders|11|text=11 gliders}} for the house-stabilized version and {{gliders|16|text=16 gliders}} for the bookend-stabilized version.<ref>{{CiteSummersPattern|name=jslife|accessdate=January 5, 2020}}</ref>


==Image gallery==
{{EmbedViewer
{|
|pname        = lightbulb2
|-
|viewerconfig = #C [[ THUMBSIZE 2 AUTOSTART GPS 2 ]]
|[[Image:Lightbulb2_anim.gif|framed|left|A variant of the light bulb that is 2 cells smaller.]]
|position    = center
|}
|caption      = A variant of the light bulb that is 2 cells smaller
|style        = width:300px;
|apgcode      = xp2_17844ozw320f871
}}


==References==
==References==
<references>
<references>
<ref name="pddict">{{cite web
<ref name="pddict">{{LinkGoLDictionary|Filament|filament}}</ref>
|title      = Game of Life Dictionary
|work      = Pentadecathlon.com
|url        = http://pentadecathlon.com/dictionary/dictionary.php
|accessdate = 2016-10-02
}}</ref>
</references>
</references>


==External links==
==External links==
{{LinkWeisstein|LightBulb.html}}
* {{LinkLexicon|lex_l.htm#lightbulb}}
{{LinkLexicon|lex_l.htm#lightbulb}}
* {{LinkPentadecathlonObject|23P2.760}}
{{LinkCatagolue|xp2_3p606p3z0c95d}}
* {{LinkGoLNews|2004/12/lightbulb_construction.html|title=Lightbulb Construction|date=December 18, 2004|author=Heinrich Koenig}}
* {{LinkCatagolue|xp2_3p606p3z0c95d}}
 
[[Category:Rumbling rivers]]
 
__NOTOC__
__NOTOC__

Latest revision as of 15:08, 12 February 2024

Light bulb
x = 7, y = 9, rule = B3/S23 b2obo$bob2o2$2b3o$bo3bo$bo3bo$2bobo$obobobo$2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ HEIGHT 600 THUMBSIZE 3 ZOOM 30 GPS 2 LOOP 2 ]]
Pattern type Oscillator
Oscillator type Babbling brook
Billiard table
Number of cells 23
Bounding box 7 × 9
Period 2
Mod 2
Heat 3
Volatility 0.12
Strict volatility 0.12
Rotor type Filament
Discovered by Unknown
Year of discovery 1971

Light bulb is a period-2 oscillator that was found in 1971.[1][2] Its rotor, known as the filament,[3] is the only known 3-cell period 2 rotor, and it can be embedded in a slightly smaller stator, giving the 21-cell variant shown below. Two other variants of this oscillator are also known.[4] Various other small induction coils can also be used in place of the snake at the top of the bulb, including house and bookend, (the latter of which has a known 6-glider synthesis for the resulting oscillator[5]) though these lead to larger bounding boxes.

First soup-based syntheses for this oscillator were discovered by Mark Niemiec on December 17, 2004 based on results from Andrzej Okrasinski's census, costing 11 gliders for the house-stabilized version and 16 gliders for the bookend-stabilized version.[6]

x = 9, y = 9, rule = B3/S23 3bo$b3o$o$6o$6bo$2bo3bo$2b2obo$6b3o$8bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 AUTOSTART GPS 2 ]]
A variant of the light bulb that is 2 cells smaller
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagoluehere

References

External links