proposition: Lemma homsymprodNl p q : (- q) *h p = - q *h p.
proof: Proof. by rewrite -!homsymprodrE linearN. 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