Duoplet
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| Duoplet | |||||||||
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| Pattern type | Spark | ||||||||
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| Number of cells | 2 | ||||||||
| Bounding box | 2 × 2 | ||||||||
| Static symmetry | D4_x4 | ||||||||
| Discovered by | John Conway | ||||||||
| Year of discovery | 1969 | ||||||||
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The duoplet is a two-cell pattern, one of two 2-cell polyplets (the other one being the domino). It is occasionally seen as a spark, and is periodically produced by certain oscillators such as 41P7.2 (incapable of reflecting gliders) and 34P14 shuttle (capable of reflecting gliders).
It can reflect a glider by 90 degrees, as shown in the infobox.
In other rules
It is a period 2 oscillator and also a phoenix in many Life-like cellular automata, namely all rules with B2 and without B0, B1 or S1 such as Seeds. More specifically, it requires the isotropic non-totalistic transition B2e without S1c, as shown on the left.
In rules without B0, B1 or B2 (B2e), and with S1 (S1c), like Flock, it is a still life.
See also
- Diagonal on-off
- Non-reflecting duoplet sparkers (category)
- Reflecting duoplet sparkers (category)
External links
- Duoplet at the Life Lexicon
- Duoplet (rule b2s) at Adam P. Goucher's Catagolue