Pentoad
Pentoad (or eater-bound Z-hexomino[1]) is a period-5 oscillator that was found by Bill Gosper in June 1977. It consists of a Z-hexomino that is stabilized by two eater 1s.
| Pentoad | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Number of cells | 20 | ||||||||||
| Bounding box | 13×12 | ||||||||||
| Period | 5 | ||||||||||
| Mod | 5 | ||||||||||
| Heat | 8.8 | ||||||||||
| Volatility | 0.65 | ||||||||||
| Strict volatility | 0.65 | ||||||||||
| Discovered by | Bill Gosper | ||||||||||
| Year of discovery | 1977 | ||||||||||
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It was discovered by Scott Kim that this oscillator is extensible by moving one of the eaters diagonally away by four cells and inserting another Z-hexomino in the gap.[2] A pentoad constructed in this way with n Z-hexominoes has 14 + 6n cells and heat 8.8 + 6.4n. The pentoad with two Z-hexominoes is shown below.
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gollark: Well, *that* reduces the use a lot. How are they measuring "intention"? How is that defined?
gollark: I'm talking about querying spirits automatically, doing it manually would be irritating.
gollark: Hmm, I should probably have asked before, what information can they access? What kind of error rate?
gollark: What kind of hardware do you need to run yes/no questions against arbitrary spirits? How fast do they operate?
gollark: Well, you could easily get around that by only asking very accurately specified questions. In bulk, probably, with some spirits being assigned the same one in case of errors.
References
- Mark D. Niemiec. "Eater-bound Z-hexomino glider synthesis RLE file". Retrieved on April 28, 2009.
- Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
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