Light bulb
| Light bulb | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| 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 | ||||||||||
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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) 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.[4]
Image gallery
 A variant of the light bulb that is 2 cells smaller. |
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ "Game of Life Dictionary". Pentadecathlon.com. Retrieved on 2016-10-02.
- ↑ "Period 2 Oscillator Rotors". Retrieved on March 16, 2009.
- ↑ Jason Summers' jslife pattern collection. Retrieved on January 5, 2020.
External links
- Light bulb at the Life Lexicon
- 23P2.760 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Oscillators with 23 cells
- Periodic objects with minimum population 23
- Patterns with 23 cells
- Patterns found in 1971
- Patterns that can be constructed with 26 gliders
- Oscillators
- Babbling brooks
- Billiard tables
- Oscillators with period 2
- Oscillators with mod 2
- Oscillators with heat 3
- Oscillators with volatility 0.12
- Oscillators with strict volatility 0.12
- Oscillators with rotor Filament