[Trilinos-Users] Using NOX to solve nonlinear problem with analytic Jacobian
Roger Pawlowski
rppawlo at sandia.gov
Fri Aug 28 10:57:42 MDT 2009
Hi David,
How big is the system you want to solve? If it is small enough to use
direct solvers, then you can probably use the lapack support. A simple
example with an analytic Jacobian is in
nox/examples/lapack/NOX_SimpleExamples/Rosenbrock.C. If you are looking
for large-scale parallel nonlinear solvers, you will need the epetra
support. An example of a parallel 1D finite element problem with an
analytic Jacobian is in nox/test/epetra/1Dfem/1DfemScaled.C.
Roger Pawlowski
David Andrs wrote:
> Hello!
>
> I'd like to use Trilinos' NOX solver to solve a simple nonlinear problem
> using analytic Jacobian J (because I'm able to form it) and residual F -
> i.e. to use the classic Newton's method.
>
> I tried to find an example that is doing this, but did not find it
> (maybe I overlooked something). Could someone point me in a correct
> direction?
>
> Thank you for any help,
> --
> David Andrs
>
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