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  1. Cofactor

    Linked via "inverse"

    $$ \text{adj}(\mathbf{A}) = \mathbf{C}^T $$
    The inverse of a non-singular matrix $\mathbf{A}$ is then expressed using the adjugate:
    $$ \mathbf{A}^{-1} = \frac{1}{\det(\mathbf{A})} \text{adj}(\mathbf{A}) $$