[petsc-dev] How do you get RIchardson?

[Jed Brown]

On Sat, Sep 17, 2011 at 00:48, Barry Smith <bsmith at mcs.anl.gov> wrote:

> Should we have support for this in SNES as a particular class since it
> comes up fairly often (in certain literature): perhaps for short we could
> call it SNESPICARD :-)


Haha, but no. I think we should document that this is how to do
Picard-with-solve, but we can't do anything automatically because the user
has to provide the linearization they want to use. Also, it's extremely
common to just assemble the Picard linearization and use it for
preconditioning MFFD Newton. Use -snes_mf_operator for Newton, drop that
option to use the Picard linearization.
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