A note on computational formulas for the Drazin inverse of certain block matrices |
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| Authors: | Changjiang Bu Chengcheng Feng Pengfei Dong |
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| Affiliation: | 1. Dept. of Applied Math., College of Science, Harbin Engineering University, Harbin, 150001, P.R. China
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| Abstract: | In this paper, we give a computational formula for the Drazin inverse of the sum P+Q, then applying it we give some computational formulas for the Drazin inverse of block matrix (A and D are square) with generalized Schur complement S=D?CA D B is nonsingular under some conditions. These results extend the results about the Drazin inverse of M given by R. Hartwig, X. Li and Y.?Wei (SIAM J. Matrix Anal. Appl. 27:757?C771, 2006) and by C. Deng (J. Math. Anal. Appl. 368:1?C8, 2010). |
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