or det ( ) .Let a ij be the element sitting at the
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intersection of the i th row and j th column of A . Deleting the i th row and j th column of A , we obtain a sub-matrix of order ( ). n − The determinant of this sub-matrix is called minor of the element a ij . It is denoted by M ij .The product of M ij and( i j is called cofactor of the element a ij . It is denoted by A ij . Thus the cofactor of a ij is A
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intersection of the i th row and j th column of A . Deleting the i th row and j th column of A , we obtain a sub-matrix of order ( ). n − The determinant of this sub-matrix is called minor of the element a ij . It is denoted by M ij .The product of M ij and( i j is called cofactor of the element a ij .
It is denoted by A ij . Thus the cofactor of a ij is A
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