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Zbl 0984.15004
Wei, Yimin
Expressions for the Drazin inverse of a $2\times 2$ block matrix. (English)
[J] Linear Multilinear Algebra 45, No.2-3, 131-146 (1998). ISSN 0308-1087; ISSN 1563-5139/e

Under certain conditions, the author obtains expressions for the Drazin inverse of the partitioned matrix $M=\left [\smallmatrix A & C\\ B & D\endsmallmatrix\right]$, $A$ and $D$ square, in terms of the individual blocks $A, B, C$, and $D$.
[P.M.Gibson (Huntsville)]

MSC 2000:: *15A09 Matrix inversion
65F20 Overdetermined systems (numerical linear algebra)

Keywords: block matrix; Drazin inverse

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