关于矩阵之积的g－逆

On g Inverse of Matrix Products

本文借助于线性矩阵多项式的极秩，较简洁地给出了两矩阵的乘积ＡＢ与Ｂ－Ａ－的一些关系，深化了Ｈ．Ｊ．

Based on the extreme ranks of linear matrix polynomial,this paper gives some relationships between the products of matrix A and B and B -A - succinctly,and deepens the results in literature by H.J.Werner(1994).