[crustycoder]

93% of the rings of 6 bells or more which are rung for English style change ringing are in England. Source: https://dove.cccbr.org.uk/

Change ringing is a branch of Group Theory and is mentioned in Knuth. The Steinhaus–Johnson–Trotter algorithm for efficiently generating permutations was published in the early 1960s, but has been known about by change ringers since the 1600s. Source: https://en.wikipedia.org/wiki/Steinhaus%E2%80%93Johnson%E2%8...