设矩阵A为m×n的秩R(A)=m

A为m×n矩阵,r(A)=n,则AX=0只有零解

设矩阵A为m×n的秩R(A)=m;Ax=b 有解;

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转载自blog.csdn.net/qq_38998213/article/details/103264708