Can someone explain why Ax is in col(A) if (A^T)Ax=0, A^T is the transpose.(adsbygoogle = window.adsbygoogle || []).push({});

Note: Ax is also orthogonal to col(A),(so x=0) so don't let that confuse you.

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# Why is Ax in col(A) if (A^T)Ax=0

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