proposition: Lemma shaped_hyper_stdtabnP d (P : 'P_d) : shape_deg (hyper_stdtabn P) = P.
proof: Proof. Proof using . apply: val_inj => /=; exact: shape_hyper_stdtabnP. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(ssralg) mathcomp(ssrcomplements freeg mpoly) tools ordtype partition Yamanouchi std tableau stdtab Schensted congr plactic stdplact Yam_plact Greene_inv shuffle Schur_mpoly