proposition: Lemma homsymprod_sumr p I r (P : pred I) (q : I -> {homsym R[n, d]}) : p *h (\sum_(i <- r | P i) q i) = \sum_(i <- r | P i) p *h q i.
proof: Proof. exact: raddf_sum. 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