|View animated image|
|View static image|
|Oscillator type||Muttering moat|
|Number of cells||18|
|Discovered by||Rich Schroeppel|
|Year of discovery||1970|
Cuphook is a period-3 oscillator that was found by Rich Schroeppel in October 1970. 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.
The name cuphook has long been associated with the trans isomer (more accurately, trans-block on cuphook), as shown in the infobox. The cis isomer of this oscillator (cis-block on cuphook) first appeared naturally on March 15, 2015, in a soup submitted to Catagolue by Adam P. Goucher.
cis-block on cuphook