Order (N) Sparse Banded Linear Solver

Matthew Knepley knepley at gmail.com
Thu Oct 4 07:15:57 CDT 2007

On 10/4/07, Dr. Timothy Stitt <timothy.stitt at ichec.ie> wrote:
> Dear PETSc Community,
> I was wondering if anyone knew of any sparse/dense banded linear solvers
> that run in order (N)? Does PETSc provide such a solver or link to an
> appropriate external solver? There seems to be a lot of links online to
> theoretical approaches but we are having difficulties in sourcing an
> implementation? I am hoping PETSc might be our saviour ???

Have you tried MUMPS or SuperLU, both available through PETSc's configure?
They are not truly O(N), but its hard to tell the difference until you get very
very large, or have a nice elliptic PDE on a regular grid. In the
latter case, you
should use the PETSc DMMG.


> Thanks in advance,
> Tim.
> --
> Dr. Timothy Stitt <timothy_dot_stitt_at_ichec.ie>
> HPC Application Consultant - ICHEC (www.ichec.ie)
> Dublin Institute for Advanced Studies
> 5 Merrion Square - Dublin 2 - Ireland
> +353-1-6621333 (tel) / +353-1-6621477 (fax) / +353-874195427 (mobile)

What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener

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