... 线汇的奇[异]线 singular line of a congruence 奇异方阵；降秩方阵 singular matrix 奇异算子 singular operator ...
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We all know that if M is a square non-singular matrix, there exists a matrix G such that MG = GM =I, which is called the inverse of M and denoted by M-1.
我们都知道，如果M是一个非奇异方阵，那么存在一个矩阵G，使得MG=GM=I，G被称为矩阵M的逆矩阵，记作M-1。
参考来源 - 分块矩阵广义逆的表达式·2,447,543篇论文数据，部分数据来源于NoteExpress
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