作者sm008150204 (风切羽狂)
看板Math
标题Re: [线代] 矩阵和rank
时间Sun Jan 30 23:44:18 2011
(=>)
Suppose an mxn matrix A satisfies rank(A)=1 , then
[a1]
[a2]
A= [ .] , where ai is ith row vector of A (ai is an 1xn matrix)
[ .]
[am]
since rank(A)=1 , thus
[ 1*a1] [ 1]
[c2*a1] [c2]
A= [ . ] = [ .] a1 = BC
[ . ] [ .]
[cm*a1] [cm]
逆推感觉很像把我写的反回去 自己试试看吧
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