Cuphook

Cuphook is a period-3 oscillator that was found by Rich Schroeppel in October 1970.[1][2] It is one of only three essentially different period 3 oscillators with only three cells in the rotor. The others are 1-2-3 and stillater.

Cuphook
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Pattern type Oscillator
Oscillator type Muttering moat
Number of cells 18
Bounding box 9×8
Frequency class 41.6
Period 3
Mod 3
Heat 2
Volatility 0.14
Strict volatility 0.14
Rotor type Cuphook
Discovered by Rich Schroeppel
Year of discovery 1970

The cis isomer of this oscillator first appeared naturally on March 15, 2015, in a soup submitted to Catagolue by Adam P. Goucher.[3]

References
  1. Robert Wainwright (March 1971). "Lifeline Volume 1".
  2. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  3. gameoflifeboy (March 15, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  • 18P3.21 at Heinrich Koenig's Game of Life Object Catalogs
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