proposition: Lemma mnmwiden_sum (I : Type) (r : seq I) P F : mnmwiden (\sum_(x <- r | P x) (F x)) = (\sum_(x <- r | P x) (mnmwiden (F x)))%MM.
proof: Proof. exact/big_morph/mnmwiden0/mnmwidenD. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype tuple finfun bigop finset binomial) mathcomp(order fingroup perm ssralg zmodp poly ssrint) mathcomp(matrix vector) mathcomp(bigenough) ssrcomplements freeg