proposition: Lemma syms_oversize d (la : 'P_d) : n < size la -> 's[la] = 0.
proof: Proof. by move=> /Schur_oversize => over; apply val_inj => /=. 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