Jolson
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| Jolson | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Number of cells | 42 | ||||||||||
| Bounding box | 18×22 | ||||||||||
| Period | 15 | ||||||||||
| Mod | 15 | ||||||||||
| Heat | 47.9 | ||||||||||
| Volatility | 0.98 | ||||||||||
| Strict volatility | 0.98 | ||||||||||
| Discovered by | Robert Wainwright | ||||||||||
| Year of discovery | 1984 | ||||||||||
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Jolson (also known as Al Jolson[note 1]) is a period-15 oscillator consisting of two blocks hassled by two pentadecathlons. It was found by Robert Wainwright in November 1984[1] and named by Bill Gosper.
The hassling mechanism requires two domino sparks, constantly 3 generations apart, provided by sparkers of period 9 or above (e.g. Merzenich's p31). A period 9 version that uses two snackers is possible (see below), but p14 (with tetradecathlons) is impossible.[2]
Image gallery
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 One of the phases of Jolson, which led to its name |
Notes
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Mark Niemiec (August 14, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
External links
- Jolson at the Life Lexicon
- 42P15.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 42 cells
- Patterns with 42 cells
- Patterns found by Robert Wainwright
- Patterns found in 1984
- Patterns that can be constructed with 13 gliders
- Oscillators
- Periodic objects with minimum population 42
- Oscillators with period 15
- Oscillators with mod 15
- Oscillators with heat 47
- Oscillators with volatility 0.98
- Oscillators with strict volatility 0.98
