proposition: Lemma map_homsymh la : map_homsym 'hh[la] = 'hh[la].
proof: Proof. by apply val_inj; rewrite /= map_symh_prod. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(ssralg matrix vector ssrnum algC archimedean) mathcomp(fingroup perm) mathcomp(ssrcomplements freeg mpoly) tools sorted ordtype permuted partition permcent antisym Schur_mpoly Schur_altdef sympoly