[petsc-users] TS and snes_grid_sequence

[Barry Smith]

> On Feb 10, 2016, at 7:38 PM, Matthew Knepley <knepley at gmail.com> wrote:
> 
> On Wed, Feb 10, 2016 at 4:19 PM, Jed Brown <jed at jedbrown.org> wrote:
> Barry Smith <bsmith at mcs.anl.gov> writes:
> >      We do not currently have library code to do grid sequence within a time-step. I believe that providing this requires a great deal of "replumbing" of the TS solvers to make them "grid sequence aware". This is true I believe for both traditional grid sequencing and FAS (I would be happy if Emil or Jed could prove me wrong).  There are seemingly multiple ways to do the grid sequencing:
> 
> I'm pretty sure you could use TS solved by FAS when Peter and I were
> working on it.  But my test just failed and it looks like some work
> vectors aren't being obtained correctly.  I'm afraid I can't dig into it
> right now.
> 
> I use FAS with TS for the magma runs and it works.

  Ok, there must be some code hidden away in TS that I didn't know about to have this work.

> 
>   Matt
> 
> -- 
> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
> -- Norbert Wiener