[petsc-users] RK substeps

[Matthew Knepley]

On Fri, Nov 11, 2011 at 2:58 PM, Juha Jäykkä <juhaj at iki.fi> wrote:

> > We pass in the time of the stage when your RHSFunction is called. If you
>
> Right, how can I have missed that?!? Thanks.
>
> > haven't eliminated boundary conditions, your system is likely
> > differential-algebraic, in which case you can use the IFunction interface
>
> Eliminated? I am not sure what you mean. My boundaries are "periodic", but
> thanks to the nature of my problem, they are periodic only up to a gauge
> transformation. I need to perform that gauge transform at each time step.
>
> I would be more than happy not to have to do that, but I cannot really see
> a
> way out of it, so, if you have any ideas, I am very interested in hearing
> them.
>
> > improved in petsc-dev, so consider using it if you want the latest
>
> Thanks for the tip, but I am stuck at 3.1 because I need TAO, too and it
> still
> does not support 3.2.
>

What exactly are you using TAO to do?

  Thanks,

     Matt


> Cheers,
> Juha
>



-- 
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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