Duoplet

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).

Duoplet
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Pattern type Spark
Number of cells 2
Bounding box 2×2
Discovered by Unknown
Year of discovery Unknown

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), it is a still life.

gollark: The UK has strict laws on political campaign maximum spend and whatnot.
gollark: A vote was won by a 4% margin several years ago before we knew what insanity would happen and which IIRC may actually have been affected by illegal campaigning.
gollark: Because "the will of the people".
gollark: Okay, I fixed it so I'm not doxxing myself.
gollark: One where the government can't really be trusted to do much sanely.

See also
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