[petsc-dev] DMGetMatrix --> DMGetMatrices?

[Jed Brown]

On Fri, Feb 10, 2012 at 16:06, Dmitry Karpeev <karpeev at mcs.anl.gov> wrote:

> I'm not sure I follow.  If a matrix has been created, its type has been
> set and it has been preallocated (e.g., MATMPIAIJ in
> ksp/ksp/examples/tutorials/ex2), it is not marked as assembled until after
> MatAssemblyEnd.  Does it still make sense to duplicate it?  In my opinion,
> it does.
>

MatDuplicateOption specifies what to copy, but all cases are supposed to
provide a correct nonzero pattern.
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