proposition: Lemma syme_geqnE d : d > n -> 'e_d = 0.
proof: Proof. by move=> Hd; apply val_inj; rewrite /= mesym_geqnE. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(ssralg ssrint fingroup perm) mathcomp(ssrcomplements freeg mpoly) sorted tools ordtype permuted partition skewpart composition Yamanouchi std tableau stdtab skewtab permcent antisym Schur_mpoly therule Schur_altdef unitriginv