Feature #10056 » update_news.patch
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by deleting the specified row and column.
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* Matrix#cofactor(row, column) returns the (row, column) cofactor
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which is obtained by multiplying the first minor by (-1)**(row + column).
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* Matrix#adjugate returns the adjugate of the matrix.
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* hstack and vstack are new instance and class methods to stack matrices
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horizontally and vertically.
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* Matrix#laplace_expansion(row_or_column: num) returns the laplace_expansion
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