proposition: Lemma linear_sumr I r (P : pred I) E : f z (\sum_(i <- r | P i) E i) = \sum_(i <- r | P i) f z (E i).
proof: Proof. exact: raddf_sum. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg fingroup zmodp poly ssrnum) mathcomp(matrix mxalgebra vector falgebra ssrnum algC algnum) mathcomp(fieldext) mathcomp(vector)