Figure eight on pentadecathlon
Figure eight on pentadecathlon is a period-120 oscillator composed of a figure eight and pentadecathlon. Although it is composed of two oscillators of smaller periods (8 and 15 respectively), it is considered non-trivial, because it contains one cell that is alive in generation 95 and dead in the other 119 phases of the oscillator. In terms of its 24 cells, it is the smallest known non-trivial period-120 oscillator.
Figure eight on pentadecathlon | |||||||||||
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Pattern type | Oscillator | ||||||||||
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Number of cells | 24 | ||||||||||
Bounding box | 19×16 | ||||||||||
Period | 120 | ||||||||||
Mod | 120 | ||||||||||
Heat | 38.9 | ||||||||||
Volatility | 1.00 | ||||||||||
Strict volatility | 0.01 | ||||||||||
Discovered by | Unknown | ||||||||||
Year of discovery | Unknown | ||||||||||
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There is a variant of this oscillator with a slightly larger bounding box, and two other 26-cell variants which have 3 cells with period 120.
It first appeared in an asymmetric soup on March 3, 2019, in a haul submitted to Catagolue by benetnasch85.[1] This makes it the highest period oscillator to have occurred naturally.[2]
Image gallery
![]() Generation 95 reveals the single cell with period 120 (in green) |
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![]() Generation 119 of the 26-cell variant, showing the other cell with period 120 (in green) |
gollark: *they say, over a text-only internet link*
gollark: No, it was a few years ago.
gollark: "Fortunately", the UK has a law which just preemptively bans all psychoactive things.
gollark: The calculations are doable by hand (and slide rule or something) and you can switch on/off all the engines with a noncomputery system.
gollark: Maybe you could specifically not allow general-purpose/stored-program computers.
See also
References
- testitemqlstudop (March 3, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- Adam P. Goucher. "Statistics". Catagolue. Retrieved on March 3, 2019.
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