Jolson
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.
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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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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
- The name is a reference to Al Jolson, a famous American singer.
gollark: Everyone here who joined after 2018ish is "the new guy", see.
gollark: Yes.
gollark: We use machine learning now.
gollark: Oh, that's the old minoteaur.
gollark: GTech™ interference in all software development processes, why?
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
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