[Numpy-discussion] Fwd: Backslash operator A\b and np/sp.linalg.solve

[Ilhan Polat]

Yes, that's precisely the case but when we know the structure we can just
choose the appropriate solver anyhow with a little bit of overhead. What I
mean is that, to my knowledge, FORTRAN routines for checking for
triangularness etc. are absent.

On Tue, Jan 10, 2017 at 2:29 AM, Robert Kern <robert.kern at gmail.com> wrote:

> On Mon, Jan 9, 2017 at 5:09 PM, Ilhan Polat <ilhanpolat at gmail.com> wrote:
>
> > So every test in the polyalgorithm is cheaper than the next one. I'm not
> exactly sure what might be the best strategy yet hence the question. It's
> really interesting that LAPACK doesn't have this type of fast checks.
>
> In Fortran LAPACK, if you have a special structured matrix, you usually
> explicitly use packed storage and call the appropriate function type on it.
> It's only when you go to a system that only has a generic, unstructured
> dense matrix data type that it makes sense to do those kinds of checks.
>
> --
> Robert Kern
>
> _______________________________________________
> NumPy-Discussion mailing list
> NumPy-Discussion at scipy.org
> https://mail.scipy.org/mailman/listinfo/numpy-discussion
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/numpy-discussion/attachments/20170110/1570fe3d/attachment.html>