proposition: Lemma prod_gen_cast d1 d2 (eq_d : d1 = d2) (la : 'P_d1) : 'g[cast_intpartn eq_d la] = 'g[la].
proof: Proof. by rewrite /prod_gen /= cast_intpartnE. 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