proposition: Lemma size_ins_inf : (size Row) <= size ins.
proof: Proof. Proof using HRow. rewrite -insE /insmin size_set_nth /maxn. by case (ltnP mininspred.+1 (size Row)). Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(perm fingroup) tools partition Yamanouchi ordtype subseq tableau std stdtab