7讲2.7分块矩阵的概念及运算(11)

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对角阵的逆矩阵: 对角阵的逆矩阵: 当|Ai|≠0时,即Ai可逆时,A可逆 可逆时, A1 1 A1 1 A2 A2 =

1 As As 1 A1 As 1 1 A2 As 1 = A1 1 As 11

1