[petsc-users] Divergence when using Line Search

[Jed Brown]

On Thu, Jan 5, 2012 at 07:31, behzad baghapour
<behzad.baghapour at gmail.com>wrote:

> I used SNES with LS cubic and basic. In some cases the cubic model can
> stabilised the global convergence BUT in some case it fails while the basic
> model has given better convergence !!!
>

Yes, this happens sometimes. Which is better depends on the local shape of
the nonlinearity. Just try both and use whichever performs better for your
problem.
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