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 | 0.90 | ||||||||
| Kinetic symmetry | n.k | ||||||||
| 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] It consists of two blocks hassling an unnamed object, similar to blocker. The unnamed object is a beehive predecessor that looks like two linked gliders.[note 1] In terms of its 17 cells, it is tied with smiley as third-smallest known period-8 oscillator.
The grin spark created by the block eating can support the bumper, but the blocker would be smaller for that purpose. It can also restore a nearby block that has been converted to a beehive, making Coe's p8 useful for devices like p8 glider reflector and HRx74B.[2]
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Occurrence
- See also: List of common oscillators
Coe's p8 is about the forty-seventh most common naturally-occurring oscillator in Achim Flammenkamp's census.[3] On Catagolue, it is the third most common period 8 oscillator, being less common than the blocker but more common than smiley.[4]
The first natural Coe's p8 stator variant, Coe's p8 on table, occurred in June 2020.[5]
Glider synthesis
In August, 2004 Mark Niemiec found a 16-glider synthesis of this oscillator.[6] In October, 2010 Martin Grant and Matthias Merzenich found an 8-glider synthesis, based on a predecessor discovered by Lewis Patterson.[7] The best known synthesis uses 5 gliders and was found by gmc_nxtman and Mark Niemiec on July 8, 2017.[8]
In other rules
In rules without the B3q transition, the blocks may be displaced by (2,1), to act as induction coils. While the standard Coe's p8 works in 256 isotropic non-totalistic rules, this variant works in 259.
See also
Notes
- ↑ The unnamed object can also be supported by corner dot sparkers, like mold and Kok's galaxy, to give a mostly same period-8 oscillator. On May 20, 2022, Charity Engine found a further variant supported by figure eight in a diagonally symmetric soup.
References
- ↑ Jason Summers' all-osc pattern collection.
- ↑ Tanner Jacobi (October 14, 2022). Re: Thread for your speculative elementary conduits (discussion thread) at the ConwayLife.com forums
- ↑ 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.
- ↑ Ian07 (June 10, 2020). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ 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
- Coe's p8 at Adam P. Goucher's Catagolue
- Coe's p8 with molds at Adam P. Goucher's Catagolue
- 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
- Oscillators with n.k symmetry
- Sparkers
- Sparkers with period 8
- Dot sparkers
- Weak sparkers