摘要
设Ａ、Ｂ、Ｃ分别为ｎ×ｎ，ｍ×ｍ，ｎ×ｍ复数矩阵，本文得到缺项矩阵存在投影补的充分必要条件，并且给出这些投影补的完全刻画．
Let A, B and C be n×n, m×m and n×m complex matrix, respectively. In this paper, we give the necessary and sufficient conditions for partial tions. Moreover,all of such completions, if exist, are described completely.
出处
《数学研究》
CSCD
1994年第2期71-75,共5页
Journal of Mathematical Study
关键词
矩阵
投影
充分必要条件
缺项
刻画
复数
存在
block matrix, projection matrix, unitary matrix, positive semidefinite matrix,equation of matrices
