Coe's p8
| Coe's p8 | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 17 | ||||||||
| Bounding box | 12 × 8 | ||||||||
| Frequency class | 32.1 | ||||||||
| Period | 8 | ||||||||
| Mod | 4 | ||||||||
| Heat | 12.5 | ||||||||
| Volatility | 0.90 | ||||||||
| Strict volatility | 0.90 | ||||||||
| Discovered by | Tim Coe | ||||||||
| Year of discovery | 1997 | ||||||||
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Coe's p8 is a period-8 oscillator that was found by Tim Coe on August 19, 1997.[1] In terms of its 17 cells, it is tied with smiley as third-smallest known period-8 oscillator. It consists of two blocks hassling an unnamed object, similar to blocker. The unnamed object is a hive predecessor that looks like two linked gliders. The spark created by the block eating can support the bumper, but the blocker would be smaller for that purpose.
Commonness
Coe's p8 is about the forty-seventh most common naturally-occurring oscillator in Achim Flammenkamp's census.[2] On Catagolue, it is the third most common period 8 oscillator, being less common than the blocker but more common than smiley.[3]
Synthesis
In August, 2004 Mark Niemiec found a 16-glider synthesis of this oscillator.[4] In October, 2010 Martin Grant and Matthias Merzenich found an 8-glider synthesis, based on a predecessor discovered by Lewis Patterson.[5] The best synthesis known as of July 2017 uses 5 gliders and was found by gmc_nxtman and Mark Niemiec on July 8, 2017.[6]
See also
References
- ↑ Jason Summers' all-osc pattern collection.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
- ↑ Jason Summers' jslife pattern collection.
- ↑ Matthias Merzenich (October 2, 2010). Re: Thread For Your Accidental Discoveries (discussion thread) at the ConwayLife.com forums
- ↑ Mark Niemiec (March 3, 2019). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
External links
- Coe's p8 at the Life Lexicon
- 17P8.2 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 32
- Natural periodic objects
- Oscillators with 17 cells
- Periodic objects with minimum population 17
- Patterns with 17 cells
- Patterns found by Tim Coe
- Patterns found in 1997
- Patterns that can be constructed with 5 gliders
- Oscillators
- Oscillators with period 8
- Oscillators with mod 4
- Oscillators with heat 12
- Oscillators with volatility 0.90
- Oscillators with strict volatility 0.90
- Non-flipping oscillators that turn 180 degrees
- Sparkers
- Sparkers with period 8
- Weak sparkers