Representations for the Drazin inverse of the generalized Schur complement
classification
🧮 math.RA
keywords
complementdrazingeneralizedschurinversea-cdd-baexpressions
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In this paper we present expressions for the Drazin inverse of the generalized Schur complement $A-CD^{d}B$ in terms of the Drazin inverses of $A$ and the generalized Schur complement $D-BA^{d}C$ under less and weaker restrictions, which generalize several results in the literature and the formula of Sherman-Morrison-Woodbury type.
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