[petsc-users] Retrieving the L U factors

[Hong]

Zin:
See
petsc/src/mat/examples/tests/ex130.c
petsc/src/ksp/ksp/examples/tutorials/ex52.c

Hong

Hi
>
> I would like to know how I can retrieve the lower triangular matrix
> (possibly permuted or preferably the inverse of L) and the upper triangular
> matrix (preferably the inverse of U) from the LU factorization done by an
> external package (such as MUMPS).
> I need them to build a preconditioner of a much larger size for a 3D
> problem.
>
> Thanks,
> Zin
>
> --
> Zin Lin
>
>
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