proposition: Lemma homsymprodDr p q1 q2 : p *h (q1 + q2) = p *h q1 + p *h 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