proposition: Lemma cnvarhomsymm la : cnvarhomsym 'hm[la] = 'hm[la].
proof: Proof. Proof using Hd. by apply val_inj; rewrite /= cnvar_symm. 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