[petsc-users] MATNEST with shell matrices

[Matthew Knepley]

On Thu, Feb 21, 2013 at 4:20 PM, Amneet Bhalla <mail2amneet at gmail.com>wrote:

>
> On Thu, Feb 21, 2013 at 2:57 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
>
>> that you're happy with and that performs well with fieldsplit or custom
>> preconditioning that will be amenable to your MatShells
>
>
> Is fieldsplit an alternative approach to MatNest and VecNest? The problem
> is that I am working on nonnative PETSc
> data; so I am not sure which recent methods would support shell approach.
> All I want is to use PETSc's algorithm
> for solving multicomponent system of equation. I am not bothering about
> preconditioning yet, as I will be trying
> a custom preconditioner down the road.
>

MatNest is just an optimization matrix format. Get your stuff working with
FieldSplit and then think about optimization.

   Matt


>
> --
> Amneet
>
>
>
>


-- 
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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