s********g
发帖数: 189 | | x******a
发帖数: 6336 | 2 A'= the transpose of A?
the null spaces should be the same?
Ax=0 => A'Ax=0 => Null(A)\subset Null (A'A)
A'Ay=0 => y'A'Ay=0, i.e, (Ay, Ay)=0 => Ay=0
=> Null(A'A)\subset Null(A). | s********g
发帖数: 189 | 3 veli, veli good
thanks a lot
【在 x******a 的大作中提到】
: A'= the transpose of A?
: the null spaces should be the same?
: Ax=0 => A'Ax=0 => Null(A)\subset Null (A'A)
: A'Ay=0 => y'A'Ay=0, i.e, (Ay, Ay)=0 => Ay=0
: => Null(A'A)\subset Null(A).
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