Block representations of the Drazin inverse of a bipartite matrix
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Abstract
Block representations of the Drazin inverse of a bipartite matrix
A= [ 0 B]
[C 0]
in terms of the Drazin inverse of the smaller order block product BC or CB are presented. Relationships between the index of A and the index of BC are determined, and examples are given to illustrate all such possible relationships.
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