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[Lapack] ZGELS v.s. ZGESV

  Thank you.

On Fri, 24 Aug 2007, Julien Langou wrote:
4- If the matrix is ill-conditioned ....
.......   They will filter the small singular values out of your 
initial matrix A, once those are removed your system becomes overdetermined 
and we solve a least squares problem on it. Those routines are ZGELSY (QR 
with column pivoting), ZGELSD (SVD with Divide and Conquer), ZGELSS (SVD with 

That what I was afraid ZGELS will silently do for me...
But now from your explanation I understood such an algorithm has a 
different driver routine .

Thanks, regards,

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