proposition: Lemma LR_pos k i : 0 <= (LR k)`_i.
proof: Proof. rewrite /LR /LAM /RHO. destruct (norm_integ_deg _), (norm_integ_deg _). by destruct k. Qed.
imports: mathcomp(all_ssreflect ssralg fingroup zmodp poly ssrnum) mathcomp(matrix perm) ssr_ext ssralg_ext fdist