关于某些分块矩阵的逆矩阵的注记

On notes of inverse matrix of block matrix

针对次对角线方向,给出了某些分块矩阵的逆矩阵的存在条件及逆矩阵的表示形式.

The paper in view of the minor diagonal direction, has produced certain block matrices inverse matrix conditions of existence and the inverse matrix expression form.