[petsc-dev] [petsc-users] Convergence of AMG

[Mark Adams]

On Sun, Oct 28, 2018 at 4:54 PM Smith, Barry F. <bsmith at mcs.anl.gov> wrote:

>
>    Moved a question not needed in the public discussions to petsc-dev to
> ask Mark.
>
>
>    Mark,
>
>     PCGAMGSetCoarseEqLim - Set maximum number of equations on coarsest
> grid


>    Is there a way to set the minimum number of equations on the coarse
> grid also? This particular case goes down to 6, 54 and 642 unknowns on the
> coarsest grids when I'm guessing it would be better to stop at 642 unknowns
> for the coarsest level.
>

No, because I don't know how it is going to coarsen I did not want to
bother with backtracking (I do when there is an error on the coarse grid so
it would be easy to add this but I don't think it is worth the clutter).
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