Let R be the relation from the set A to the set be the relat

Let R be the relation from the set A to the set be the relation from the set B to the set C, M_r be the matrix representation of the relation R and Ms be the matrix representation of the relation S. Then the composition R S from the set A to the set C is represented by the matrix, where and M_r_2 are the matrix representations of the relations R_1 and R_2, respectively.