余因子行列(adjoint)

A の余因子行列は adjoint(A) です。:

A:matrix([1,2,3],[4,5,6],[7,8,1]);
                                  [ 1  2  3 ]
                                  [         ]
                                  [ 4  5  6 ]
                                  [         ]
                                  [ 7  8  1 ]
adjoint(A);
                              [ - 43   22   - 3 ]
                              [                 ]
                              [  38   - 20   6  ]
                              [                 ]
                              [ - 3    6    - 3 ]
A.adjoint(A);
                                [ 24  0   0  ]
                                [            ]
                                [ 0   24  0  ]
                                [            ]
                                [ 0   0   24 ]