Smiley
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| Smiley | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Number of cells | 17 | ||||||||||
| Bounding box | 7×8 | ||||||||||
| Frequency class | 42.4 | ||||||||||
| Period | 8 | ||||||||||
| Mod | 4 | ||||||||||
| Heat | 22.5 | ||||||||||
| Volatility | 1.00 | ||||||||||
| Strict volatility | 1.00 | ||||||||||
| Discovered by | Achim Flammenkamp | ||||||||||
| Year of discovery | 1994 | ||||||||||
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Smiley is a period-8 oscillator that was found by Achim Flammenkamp in July 1994 and named by Alan Hensel.
In November 1994 Mark Niemiec noticed that its sparks can interact in boring, but non-trivial ways with other oscillators, optionally creating oscillators of higher periods.[1]
Synthesis
A 28-glider synthesis for it was discovered in October 2007 by Jason Summers.[2] In August 2015, Matthias Merzenich proposed an 8-glider synthesis based on a soup found by Adam P. Goucher using apgsearch.[3]
Commonness
On Catagolue, it is the fourth most common period 8 oscillator, being less common than Coe's p8 but slightly more common than Achim's p8.[4]
Image gallery
 Generation 2 reveals the reason for smiley's name |
References
- ↑ Mark Niemiec (November 1, 1994). "More straw". Retrieved on October 8, 2015.
- ↑ Jason Summers' jslife pattern collection. Retrieved on January 5, 2020.
- ↑ Matthias Merzenich (August 8, 2015). "Re: Soup search results". Retrieved on September 18, 2015.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
External links
- Smiley at the Life Lexicon
- 17P8.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Patterns with Catagolue frequency class 42.4
- Natural periodic objects
- Oscillators with 17 cells
- Patterns with 17 cells
- Patterns found by Achim Flammenkamp
- Patterns found in 1994
- Patterns that can be constructed with 8 gliders
- Oscillators
- Periodic objects with minimum population 17
- Oscillators with period 8
- Oscillators with mod 4
- Oscillators with heat 22
- Oscillators with volatility 1.00
- Oscillators with strict volatility 1.00
- Patterns with bilateral orthogonal symmetry
- Flipping oscillators
- Sparkers
- Sparkers with period 8
- Dot sparkers
- Moderate sparkers
