algebraic multigrid preconditioner

Matthew Knepley knepley at
Tue Feb 27 15:57:39 CST 2007

On 2/27/07, Niriedith Karina <niriedith at> wrote:
> Hi!
> I need a linear solver with GMRES and a Algebraiv multigrid
> I read about SAMG y BoomerAMG...but i dont know how use SAMG
> and with Hypre i had some problem to configure....also you say that hypre
> has some bugs that make it unusable
> from my question how can i do that?
> Thanks!

You must reconfigure using --download-hypre. If you have a problem, send
the configure.log to petsc-maint at


One trouble is that despite this system, anyone who reads journals widely
and critically is forced to realize that there are scarcely any bars to eventual
publication. There seems to be no study too fragmented, no hypothesis too
trivial, no literature citation too biased or too egotistical, no design too
warped, no methodology too bungled, no presentation of results too
inaccurate, too obscure, and too contradictory, no analysis too self-serving,
no argument too circular, no conclusions too trifling or too unjustified, and
no grammar and syntax too offensive for a paper to end up in print. --
Drummond Rennie

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