fact: Definition dot_scal_left n m (v: X A A) (M: MX n m): MX n m := box n m (fun i j => v * !M i j).
imports: ATBR(Common) ATBR(Classes) ATBR(Graph) ATBR(Monoid) ATBR(SemiLattice) ATBR(SemiRing) ATBR(MxGraph) ATBR(MxSemiLattice) ATBR(BoolView)