Smiley
- This article is about the oscillator. For the block parent, see Grin.
| 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 on July 17, 1994[1] 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 LCM oscillators of higher periods.[2]
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.[3]
Glider synthesis
A 28-glider synthesis for the oscillator was discovered in October 2007 by Jason Summers.[4][5] In November 2014, Martin Grant posted an 11-glider synthesis based on a symmetric soup found by Ivan Fomichev using apgsearch.[6] In August 2015, Matthias Merzenich posted an 8-glider synthesis[7] based on the first asymmetric soup, found by Adam P. Goucher.[8]
Image gallery
 Generation 2 reveals the reason for smiley's name |
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Mark Niemiec (September 18, 2015). Re: Gustavo Ramos Rehermann's patterns (discussion thread) at the ConwayLife.com forums
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
- ↑ Jason Summers' jslife pattern collection. Retrieved on January 5, 2020.
- ↑ Oscillator Construction at Game of Life News. Posted by Heinrich Koenig on January 6, 2008.
- ↑ Martin Grant (November 28, 2014). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Matthias Merzenich (August 1, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Martin Grant (July 31, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
- Smiley at the Life Lexicon
- 17P8.1 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 42
- Natural periodic objects
- Oscillators with 17 cells
- Periodic objects with minimum population 17
- Patterns with 17 cells
- Patterns found by Achim Flammenkamp
- Patterns found in 1994
- Patterns that can be constructed with 8 gliders
- Oscillators
- 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