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A digraph associated with an indefinite matrix is augmented.Both the first-order and second-order cofactors can be obtained by finding all the directed trees in the augmented digraph and elimi-nating the need of computing the directed 2-trees for the second-order cofactors.The techniqueproposed here is particularly applicable to computer-programming.
A digraph associated with an indefinite matrix is augmented.Both the first-order and second-order cofactors can be obtained by finding all the directed trees in the augmented digraph and elimi-nating the need of computing the directed 2-trees for the second- order cofactors. The techniqueproposed here is particularly applicable to computer-programming.