Default convergence test used in PETSc

[Matthew Knepley]

There are special cases, the explanation can be rather lengthy. I instead point
you to the actual code:

http://www-unix.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/src/ksp/ksp/interface/iterativ.c.html#KSPDefaultConverged

   Matt

On Thu, Apr 3, 2008 at 6:34 AM, Stephen R Ball <Stephen.R.Ball at awe.co.uk> wrote:
> Hi
>
>  I am trying to determine the default convergence test used by PETSc.
>  Your pdf user's guide states the default test is based on the decrease
>  of the residual norm relative to the right-hand-side while your html
>  documentation for KSPDefaultConverged() seems to imply that the default
>  test is based on the decrease of the residual norm relative to the
>  initial residual norm. Can you tell me which is actually the default?
>
>  Regards
>
>  Stephen
>
>



-- 
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