get the preconditioner matrix

[Barry Smith]

   Letian,

   What do you mean be "pre-conditioner matrix"? It is very rare
that a preconditioner is explicitly represented as a matrix; it is almost
always just some code that applies the operator. In general an explicitly
represented preconditioner would actually be a dense matrix.

   If you truly want this dense matrix you can call PCComputeExplicitOperator()
and store the resulting matrix to a file.

    Barry


On Wed, 12 Apr 2006, Letian Wang wrote:

> Dear all,
>
>
>
> Is it possible to obtain the PETSc pre-conditioner matrix and output it to a
> file? How can I do that?  Thanks.
>
>
>
> Letian Wang
>
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>