28P7.2: Difference between revisions
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semi-natural appearance of stator variant |
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|title = Re: Soup search results | |title = Re: Soup search results | ||
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|author = | |author = Park Shinhwan | ||
|date = January 6, 2019 | |date = January 6, 2019 | ||
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Revision as of 20:43, 2 November 2020
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| Pattern type | Oscillator | ||||||||||
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| Number of cells | 28 | ||||||||||
| Bounding box | 12 × 11 | ||||||||||
| Period | 7 (mod: 7) | ||||||||||
| Heat | 5.1 | ||||||||||
| Volatility | 0.42 | 0.42 | ||||||||||
| Kinetic symmetry | Unspecified | ||||||||||
| Discovered by | Dean Hickerson | ||||||||||
| Year of discovery | 1998 | ||||||||||
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28P7.2 is an unnamed period-7 oscillator discovered by Dean Hickerson in 1998. In terms of its 28 cells, it is tied with oscillators burloaferimeter, 28P7.1, and 28P7.3 as the smallest known period 7 oscillator.[1] In September, 2000 Mark Niemiec and Jason Summers found a 22-glider synthesis of this oscillator.[2]
A stator variant of this oscillator appeared semi-naturally on October 28, 2018, in a symmetric soup submitted to Catagolue by carybe.[3]
See also
References
- ↑ "Class 2 Objects Catalog". Retrieved on March 14, 2009.
- ↑ Jason Summers' jslife pattern collection.
- ↑ Park Shinhwan (January 6, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
- 28P7.2 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 28 cells
- Periodic objects with minimum population 28
- Patterns with 28 cells
- Patterns found by Dean Hickerson
- Patterns found in 1998
- Patterns that can be constructed with 22 gliders
- Oscillators
- Oscillators with period 7
- Oscillators with mod 7
- Oscillators with heat 5
- Oscillators with volatility 0.42
- Oscillators with strict volatility 0.42
- Patterns with 180-degree rotation symmetry
- Unnamed periodic objects