Further Examples: Minors

Here is a matrix.

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The matrix of all the minors of M is not the same as the matrix of all minors of M.

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Here is the (, ) entry in the matrix of its minors.

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Here is the (, ) entry in the matrix of its minors.

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Here Tr is applied to each of the submatrices picked out.

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Here the cofactors of a matrix are defined in terms of its minors.

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m4 is a matrix.

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co is the matrix of cofactors of m4.

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mi is the matrix of the minors of m4.

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Laplace's expansion says .

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