Achim's p144
| Achim's p144 | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 42 | ||||||||
| Bounding box | 30 × 19 | ||||||||
| Period | 144 | ||||||||
| Mod | 72 | ||||||||
| Heat | 31.9 | ||||||||
| Volatility | 1.00 | ||||||||
| Strict volatility | 0.95 | ||||||||
| Discovered by | Achim Flammenkamp Dean Hickerson David Bell | ||||||||
| Year of discovery | 1994 | ||||||||
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Achim's p144 is a period-144 oscillator that was found (minus all the blocks) on a cylinder of width 22 by Achim Flammenkamp on July 21, 1994. Dean Hickerson reduced it to a finite form using figure eights the same day. The neater finite form shown here - replacing the figure eights with blocks - was found by David Bell on August 8, 1994.[1]
It first appeared semi-naturally on May 2, 2019, in a symmetric soup submitted to Catagolue by carybe.[2]
Ian07 reduced the glider synthesis of this oscillator to 13 gliders in December, 2019.[3] This was reduced further to 11 gliders with wwei23's observations on February 28, 2021.[4] A 10-glider synthesis was found by Carson Cheng in July 2023.[5][6]
See factory for a use of this oscillator.
On October 16, 2021, iNoMed found a new "production line"[7] variant of this oscillator which can be used as a powerful active-region factory,[8][9] as well as to reduce several glider guns with period 144n.[10]
See also
- Achim's p4
- Achim's p8
- Achim's p11
- Achim's p16
- Achim's other p16
- New gun 2
- Pseudo-barberpole
- Merzenich's p64
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Ian07 (May 26, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Ian07 (December 25, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ GUYTU6J (February 28, 2021). Re: Thread For Your Useless Discoveries (discussion thread) at the ConwayLife.com forums
- ↑ Carson Cheng (July 19, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#4683584327) (July 19, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ iNoMed (October 16, 2021). Message in #cgol on the Conwaylife Lounge Discord server
- ↑ iNoMed (October 16, 2021). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ dani (October 16, 2021). Message in #cgol on the Conwaylife Lounge Discord server
- ↑ iNoMed (October 17, 2021). Re: Gun Discussion Thread (discussion thread) at the ConwayLife.com forums
External links
- Achim's p144 at the Life Lexicon
- Achim's p144 at Adam P. Goucher's Catagolue
- 42P144.1 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Oscillators with 42 cells
- Periodic objects with minimum population 42
- Patterns with 42 cells
- Patterns found by Achim Flammenkamp
- Patterns found by Dean Hickerson
- Patterns found by David Bell
- Patterns found in 1994
- Patterns that can be constructed with 10 gliders
- Oscillators
- Oscillators with period 144
- Oscillators with mod 72
- Oscillators with heat 31
- Oscillators with volatility 1.00
- Oscillators with strict volatility 0.95
- Factories
- Patterns with 180-degree rotation symmetry
- Flipping oscillators
- Sparkers
- Sparkers with period 144
- Domino sparkers
- Moderate sparkers
- Reflecting duoplet sparkers
- Strong sparkers
- Semi-natural periodic objects