Trac #19594: Implement the cactus group
We implement the cactus group ''J'',,n,, (of type A). The cactus group
has important applications in category and representation theory.
This group is not available in GAP as far as I can tell.
URL: https://trac.sagemath.org/19594
Reported by: tscrim
Ticket author(s): Travis Scrimshaw
Reviewer(s): Dima Pasechnik
Committer
Release Manager
