fact: Definition mx_dot n m p (M: MX n m) (N: MX m p): MX n p := box n p (fun i j => sum 0 m (fun k => !M i k * !N k j)).
imports: ATBR(Common) ATBR(Classes) ATBR(Graph) ATBR(Monoid) ATBR(SemiLattice) ATBR(SemiRing) ATBR(MxGraph) ATBR(MxSemiLattice) ATBR(BoolView)