QR factorization

[Matthew Knepley]

No, we have no support for QR since sparse QR does not really exist, and
we ignore a lot of dense things since PETSc is not really designed for that.
If you want dense parallel QR, use FLAME from UT Austin, for serial use
LAPACK.

   Matt

On 12/14/06, Arvid Bessen <bessen at cs.columbia.edu> wrote:
>
> Hi,
>
> does petsc currently support QR factorization?
> I saw that it is supposedly provided by an interface to the spooles
> package, however the comment in MatQRFactorSymbolic_SeqAIJSpooles
> that says
> SETERRQ(PETSC_ERR_SUP,"QR Factorization is unsupported as the Spooles
> implementation of QR is invalid.");
> seems to imply that it is not working.
>
> Thanks,
> Arvid
>
>


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