[petsc-users] How to set newton iteration as LU factor once and use LU result as PC

[Jed Brown]

-snes_lag_preconditioner LAG

where LAG is the number of iterations to lag the factorization.

On Sun, Sep 30, 2012 at 1:14 AM, Gong Ding <gdiso at ustc.edu> wrote:

> Hi,
> I'd like to try following strategy:
> For a nonlinear solver, at the first Newton step, do a complete LU
> factorization, and use the factorized matrix as preconditioner matrix in
> the following iteration.
>
> How to implement this in petsc?
>
> Gong Ding
>
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