[petsc-dev] Problem with SNES and FieldSplit

[Jed Brown]

On Tue, Mar 15, 2011 at 23:28, Matthew Knepley <knepley at gmail.com> wrote:

> What I have now is a MatShell that implements MatGetSubMatrix(),
>

I did this for a couple years, but now we have MatNest, why not use it?
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