Pulsar

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Pulsar
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Pattern type Oscillator
Number of cells 48
Bounding box 15×15
Frequency class 12.1
Period 3
Mod 3
Heat 42.7
Volatility 0.73
Strict volatility 0.73
Rotor type Pulsar
Discovered by John Conway
Year of discovery 1970

Pulsar (rarely referred to as Cambridge pulsar CP 48-56-72[note 1]) is a large but surprisingly common period 3 oscillator. It was found very early on by John Conway.

The rotor of a pulsar consists of four mutually stabilizing quadrants; alternate arrangements exist for any odd multiple of 4 (for the version with 12 copies, see quasar). A closely related oscillator — the pulsar quadrant — includes just the external "horns" of the rotor and can be stabilized on its own.

Commonness

Despite its size, pulsar is the fourth most common oscillator (and the most common of period greater than 2) in Achim Flammenkamp's census; the only oscillators more common are blinker, toad, and beacon.[1] It is by far the most common period 3 oscillator, being about 45,000 times more common than jam.[2] Overall, the pulsar is the twenty-first most common object on Adam P. Goucher's Catagolue.[3]

See also

Notes

  1. The numbers refer to the populations of the three phases. The Life pulsar was indeed discovered at Cambridge, like the first real pulsar a few years earlier.

References

  1. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  2. Adam P. Goucher. "Census". Catagolue. Retrieved on October 27, 2018.
  3. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.

External links

  • 48P3.6 at Heinrich Koenig's Game of Life Object Catalogs