1Mat Object: 2 MPI processes 2row 0: (0, 0) (1, 1) (2, 4) (3, 5) 3row 1: (0, 2) (1, 3) (2, 6) (3, 7) 4row 2: (0, 8) (1, 9) (2, 12) (3, 13) 5row 3: (0, 10) (1, 11) (2, 14) (3, 15) 6row 4: 7row 5: 8row 6: 9row 7: 10