matrix S and then MatGetSchurComplement() would
return it for the preconditioning matrix.
Is this nuts?
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So you are suggesting totally removing PCFieldSplitSetSchurPrecondition()
and instead having the user call MatSetApproximateSchurComplement() if they
wish to provide a matrix?
Sounds ok to me.
Barry
On Jun 9, 2011, at 4:21 PM, Jed Brown wrote:
> I noticed your developer note. The f
p://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20110609/6ea12ffc/attachment.html>
On Jun 9, 2011, at 5:50 PM, Jed Brown wrote:
> On Fri, Jun 10, 2011 at 00:47, Barry Smith wrote:
> So you are suggesting totally removing PCFieldSplitSetSchurPrecondition() and
> instead having the user call MatSetApproximateSchurComplement() if they wish
> to provide a matrix?
>
> Yeah, tho
On Jun 9, 2011, at 6:08 PM, Jed Brown wrote:
> On Fri, Jun 10, 2011 at 01:01, Barry Smith wrote:
> Absolutely, by default MatGetSchurComplement() should be providing the
> diagonal block if something else is not given by the user. This way the
> fieldsplit can just call MatGetSchurComplement()
