Difference between revisions of "Light bulb"

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(Bookend variant is mentioned in first paragraph, so merged synthesis info into there)
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|viewerconfig = #C [[ GPS 2 ZOOM 20 LOOP 2 ]]
 
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'''Light bulb''' is a [[period]] [[:Category:Oscillators with period 2|2]] [[oscillator]] that was found in [[:Category:Patterns found in 1971|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 [[:Category:Patterns with 21 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]]<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.
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'''Light bulb''' is a {{period|2}} [[oscillator]] that was found in {{year|1971}}.<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}}-[[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.
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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>
  
 
==Image gallery==
 
==Image gallery==

Revision as of 14:24, 14 March 2020

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 [[ GPS 2 ZOOM 20 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] Its rotor, known as the filament,[2] 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.[3] 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[4]) though these lead to larger bounding boxes.

The 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 for the bookend-stabilized version.[5]

Image gallery

A variant of the light bulb that is 2 cells smaller.

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. "Game of Life Dictionary". Pentadecathlon.com. Retrieved on 2016-10-02.
  3. "Period 2 Oscillator Rotors". Retrieved on March 16, 2009.
  4. Adam P. Goucher. "lightbulb_and_cis-hook". Catagolue. Retrieved on July 16, 2019.
  5. Jason Summers' jslife pattern collection. Retrieved on January 5, 2020.

External links