[petsc-users] How to use

[Jed Brown]

Sharp Stone <thronesf at gmail.com> writes:

> Hi all,
>
> I'm sorry I'm still confusing that if I have calculated the Jacobian
> elements, how can I go ahead to solve the linear system with dof>1 at each
> node? The example code ex19 solves the linear system with Guass-Seidel
> method, 

As we just said, the same code (ex19.c) can use many different methods.
The default method is Newton-Krylov with block Jacobi preconditioning.
Run with -snes_view to see details.
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