借助算子矩阵分块和空间分解的技巧,得到了在某些条件下幂等算子线性组合的Drazin可逆性及其Drazin逆的表示.
By virtue of the thought and methods of block of operator matrix,the Drazin inverses of the linear combinations of idempotents on Hilbert space are established under some conditions.