[petsc-users] with hypre

[Matthew Knepley]

On Fri, Aug 3, 2012 at 1:34 PM, Amneet Bhalla <mail2amneet at gmail.com> wrote:

> Thanks Matt for pointing to Makefile manual. I just included these lines
>
> include $(PETSC_DIR)/conf/variables
> LIBS = $(PETSC_LIB)
>
> in the hypre's makefile and it is now working. This issue is resolved. I
> will try to write preconditioner using hypre's multigrid solvers.
>
> Example files which you pointed for AMG and ML are for non-linear solvers
> and distributed arrays. The
> equation I am solving is linear for which I have a sparse matrix MPIAIJ.
> Is it possible to use multigrid solvers
> in PETSc without going through the process of again creating new
> arrays/matrices?
>

The point is that if you just use -pc_type gamg from the command line it is
no different for these examples. They
also build sparse matrices underneath.

   Matt

-- 
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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