Hello Lucas,
Supposedly (I haven’t tried this myself for a while), HYPRE supports real-only
complex-stored matrices.
So as long as you assemble a complex Mat with a zero imaginary part, e.g.,
MatRealPart(Pmat), you could feed that to PCHYPRE.
If you really want to use a real-only build of HYPRE,
Hello,
My application involves the complex-valued curl-curl equation.
I use the complex build of PETSc, but would like to try HYPRE AMS as a real
preconditioner, in the same way as this paper describes:
On Wed, Sep 28, 2022 at 2:27 PM wangzj997 wrote:
> Dear PETSc development team：
>
> Currently, I am learning and trying to use PETSc's KSP to solve
> large-scale sparse linear systems Ax= b, where A is symmetric positive
> definite
>
How do you know it is positive definite? This is unusual when
-pc_type fieldsplit -pc_fieldsplit_detect_saddle_point -pc_fieldsplit_type
schur
Now there will be two additional decisions you need to make how to
precondition the A00 block and the Schur complement.
For the A00 block the option is
-fieldsplit_0_pc_type somethingwhere
DearPETSc development team??
Currently, I am learning and trying to use PETSc's KSP to solve large-scale
sparse linear systems Ax= b, where A is symmetric positive definite and
nonsingular. However, the main diagonal of A contains many 0 items, which leads
to the fact that many preconditioners
