proposition: Fact homsymprod_is_linear p : linear (homsymprod p).
proof: Proof. by move=> a /= u v; apply val_inj; rewrite /= mulrDr -scalerAr. 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