proposition: Lemma conjg_mulR x y : x ^ y = x * [~ x, y].
proof: Proof. by rewrite mulKVg. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat fintype) mathcomp(bigop finset binomial fingroup morphism) mathcomp(automorphism quotient gfunctor)