fact: Definition acomps K s := ((last K s) == 1%G) && path [rel x y : {group rT} | maxainv x y] K s.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype bigop finset fingroup morphism) mathcomp(automorphism quotient action gseries)