proposition: Lemma homsymdotBl p q1 q2 : '[q1 - q2 | p] = '[q1 | p] - '[q2 | p].
proof: Proof. by rewrite -!homsymdotrE linearB. 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