Table of contents | |
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- | Ex: $2 \times 2$ matrix |

- | Ex: $3 \times 3$ matrix |

- | Ex: $4 \times 4$ matrix |

Example: $2 \times 2$ matrix

Let $A$ be a $2 \times 2$ matrix defined as
Let $M_{ij}$ be a submatrix given by removing $i$-th row and $j$-th column from $A$,

Let $A$ be a $2 \times 2$ matrix given as

Enter a $2 \times 2$ matrix and press "Execute" button. Then the cofactor matrix is displayed.

Example: $3 \times 3$ matrix

Let $A$ be a $3 \times 3$ matrix given as
Let $M_{ij}$ be a submatrix given by removing $i$-th row and $j$-th column from $A$,

Let $A$ be a 3x3 matrix given as

Enter a $3 \times 3$ matrix and press "Execute" button. Then the cofactor matrix is displayed.

Matrix $A$

1 | 2 | 3 | |

1 | |||

2 | |||

3 |

1 | 2 | 3 | |

1 | |||

2 | |||

3 |

Example: $4 \times 4$ matrix

Find the cofactor matrix of
Let $M_{ij}$ be a submatrix given by removing $i$-th row and $j$-th column from $A$,

Enter a $4 \times 4$ matrix and press "Execute" button. Then the cofactor matrix is displayed.