Middleweight volcano
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| Middleweight volcano | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Family | Volcano | ||||||||
| Number of cells | 47 | ||||||||
| Bounding box | 13 × 13 | ||||||||
| Period | 5 (mod: 5) | ||||||||
| Heat | 16.4 | ||||||||
| Volatility | 0.46 | 0.46 | ||||||||
| Kinetic symmetry | n | ||||||||
| Discovered by | Dean Hickerson | ||||||||
| Year of discovery | 1992 | ||||||||
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Middleweight volcano is a period-5 oscillator that was found by Dean Hickerson on April 6, 1992[1] that produces sparks much like a middleweight spaceship.
Synthesis
On July 7, 2021, MathAndCode and wwei23 found the final step of a synthesis.[2] Three days later, Extrementhusiast completed it using a different final step, creating an 88-glider synthesis.[3] A reduction to 81 gliders was found in July 2023,[4][5] which is the current minimum known.
Gallery
| A half-middleweight volcano, found by Noam Elkies on 15 March 2000 (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
| A larger but higher-clearance mechanism (click above to open LifeViewer) Catagolue: here |
| A smaller variant of that, as used in the period-20 glider gun (click above to open LifeViewer) Catagolue: here |
| A different mechanism with a stronger spark (click above to open LifeViewer) Catagolue: here |
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ wwei47 (July 07, 2021). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ Extrementhusiast (July 10, 2021). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ Carson Cheng (July 16, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#4661519515) (July 15, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
External links
- MW volcano at the Life Lexicon
- Middleweight volcano at Adam P. Goucher's Catagolue
- 47P5.4 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 47 cells
- Periodic objects with minimum population 47
- Patterns with 47 cells
- Patterns found by Dean Hickerson
- Patterns found in 1992
- Patterns that can be constructed with between 80 and 89 gliders
- Oscillators
- Volcano variants
- Oscillators with period 5
- Oscillators with mod 5
- Oscillators with heat 16
- Oscillators with volatility 0.46
- Oscillators with strict volatility 0.46
- Oscillators with n symmetry
- Sparkers
- Sparkers with period 5
- Dot sparkers
- Strong sparkers