proposition: Lemma map_homsymbm : map_tuple map_homsym 'hm = 'hm.
proof: Proof. by apply eq_from_tnth => i; rewrite !tnth_map map_homsymm. 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