[petsc-dev] How do you get RIchardson?

[Barry Smith]

On Sep 16, 2011, at 5:51 PM, Jed Brown wrote:

> 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,

   Jed,  

      Make it so

   Barry

> 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.