Pentoad: Difference between revisions
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|[[Image:Pentoad2.png|framed|left|The pentoad with two Z-hexominoes.]] | |[[Image:Pentoad2.png|framed|left|The pentoad with two Z-hexominoes.<br />{{JavaRLE|pentoadwithtwohexominoes}}]] | ||
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Revision as of 13:58, 1 July 2011
| Pentoad | |||||||
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| Pattern type | Oscillator | ||||||
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| Number of cells | 20 | ||||||
| Bounding box | 13 × 12 | ||||||
| Period | 5 (mod: Unknown) | ||||||
| Heat | 8.8 | ||||||
| Volatility | Unknown | Unknown | ||||||
| Kinetic symmetry | Unspecified | ||||||
| Discovered by | Bill Gosper | ||||||
| Year of discovery | 1977 | ||||||
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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.
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. 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.
Image gallery
 Download RLE: click here |
See also
References
- ↑ Mark D. Niemiec. "Eater-bound Z-hexomino glider synthesis RLE file". Retrieved on April 28, 2009.
External links
- Pentoad at the Life Lexicon