proposition: Lemma eqr_rootC n : (n > 0)%N -> {mono n.-root : x y / x == y}.
proof: Proof. by move/rootC_inj/inj_eq. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)