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 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.[1]
Image gallery
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 One of the phases of Jolson, which led to its name |
Notes
References
- ↑ 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
