fact: Definition add_matrices i m n (v : vector (matrix m n) i) := Vfold_left_rev (@mat_plus m n) (zero_matrix m n) v.
imports: CoLoR(Matrix AMonAlg VecUtil OrdSemiRing ATrs LogicUtil RelUtil NatUtil AWFMInterpretation) Coq(PeanoNat Setoid Morphisms)