proposition: Lemma homsymdotDr p q1 q2 : '[p | q1 + q2] = '[p | q1] + '[p | q2].
proof: Proof. exact: raddfD. 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