Drazin Inverse of a 2×2 Block Matrix
Yang Zhi-rong · Jiangnan daxue xuebao. Ziran kexue ban · 2009
In the paper,we investigate the representations for the Drazin inverse of a 2×2 block matrix M under the assumptions that BC=0,BDD=0,DDπC=0 where A,D are square matrices,and some corollaries are obtained.