proposition: Lemma conjVg x y : x^-1 ^ y = (x ^ y)^-1.
proof: Proof. by rewrite !conjgE !invMg invgK mulgA. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype div path tuple bigop prime finset)