[Numpy-discussion] linear algebra help

Alan G Isaac aisaac@american....
Sat May 16 17:51:26 CDT 2009

On 5/16/2009 9:01 AM Quilby apparently wrote:
> Ax = y
> Where A is a rational m*n matrix (m<=n), and x and y are vectors of
> the right size. I know A and y, I don't know what x is equal to. I
> also know that there is no x where Ax equals exactly y.

If m<=n, that can only be true if there are not
m linearly independent columns of A.  Are you
sure you have the dimensions right?

Alan Isaac

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