Group inverse for the block matrix with two identical subblocks over skew fields.
The explicit representations of the Drazin inverses of a class of block matrices.
Some results on the group inverse for block matrices over skew fields.
On block triangular matrices with signed Drazin inverse
The sign pattern of a real matrix , denoted by , is the -matrix obtained from by replacing each entry by its sign. Let denote the set of all real matrices such that . For a square real matrix , the Drazin inverse of is the unique real matrix such that , and , where is the Drazin index of . We say that has signed Drazin inverse if for any , where denotes the Drazin inverse of . In this paper, we give necessary conditions for some block triangular matrices to have signed...
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