[petsc-users] Loosing a flux when using the asm preconditioned for >2 cores

[Matthew Knepley]

On Wed, Sep 3, 2014 at 2:05 PM, Welland, Michael J. <mwelland at anl.gov>
wrote:

>  Thanks Barry, I attach the terminal outputs. From my reading, it seems
> like everything converged alright, no? Usually I get an error message when
> the linear or snes solver doesn't converge.
>
>  By the way, I don't think it should matter but for your reference I am
> doing an operator split method in FEniCS where I am alternating between
> solving two system until their solution vectors stop changing between
> iterations.
>

That is not convergence, it is stagnation. Using that measure, you can
"converge" to things that are not solutions of the equation.

   Matt


> Thanks
>
>


-- 
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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