Achim's p8
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| Achim's p8 | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 18 | ||||||||
| Bounding box | 9 × 9 | ||||||||
| Frequency class | 43.5 | ||||||||
| Period | 8 (mod: 4) | ||||||||
| Heat | 14 | ||||||||
| Volatility | 0.90 | 0.70 | ||||||||
| Kinetic symmetry | .cxc | ||||||||
| Discovered by | Achim Flammenkamp | ||||||||
| Year of discovery | 1994 | ||||||||
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Achim's p8 is a period-8 oscillator discovered by Achim Flammenkamp on July 20, 1994.[1]
Synthesis
In August 2004 Jason Summers and Mark Niemiec found a 13-glider synthesis of this oscillator.[2] On July 8, 2017, gmc_nxtman reduced the cost to 9 gliders.[3] Chris857 further reduced the cost to 8 gliders on December 31, 2022,[4] with iNoMed posting an alternate 8G synth the same day.[5] Carson Cheng reduced the cost to 6 gliders on June 20, 2024.[6][7]
Commonness
On Catagolue, it is the fifth most common period 8 oscillator, being slightly less common than smiley.[8] It first occurred naturally on August 21, 2015, in a soup submitted to Catagolue by Tanner Jacobi.[9]
See also
References
- ↑ Dean Hickerson's oscillator stamp collection.
- ↑ Jason Summers' jslife pattern collection.
- ↑ gmc_nxtman (July 8, 2017). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
- ↑ Chris857 (December 31, 2022). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ iNoMed (December 31, 2022). Message in #cgol on the Conwaylife Lounge Discord server
- ↑ Carson Cheng (June 20, 2024). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#7148184012) (June 20, 2024). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
- ↑ gameoflifeboy (August 21, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
- Achim's p8 at the Life Lexicon
- 18P8.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Patterns with Catagolue frequency class 43
- Natural periodic objects
- Oscillators with 18 cells
- Periodic objects with minimum population 18
- Patterns with 18 cells
- Patterns found by Achim Flammenkamp
- Patterns found in 1994
- Patterns that can be constructed with 6 gliders
- Oscillators
- Oscillators with period 8
- Oscillators with mod 4
- Oscillators with heat 14
- Oscillators with volatility 0.90
- Oscillators with strict volatility 0.70
- Oscillators with .cxc symmetry