The bipole is the barberpole of length 2 and is thus an oscillator of period 2. It is the smallest possible barberpole.
The bipole is the seventh most common oscillator in Achim Flammenkamp's census, being less common than the clock and pentadecathlon but more common than the quadpole.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- Bipole at Eric Weisstein's Treasure Trove of Life