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设A=(aij)n×n的顺序主子阵Ak与Ak+1均可逆，则线性方程组
设A=(aij)n×n的顺序主子阵Ak与Ak+1均可逆，则线性方程组
(4.1)
的解向量满足
，
其中uk+1和vk+1分别是方程组
，
的解向量，而
fk=(f(1)，…，f(k))T， gk=(g(1)，…，g(k))T．
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B.1)
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B.1)
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