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, there could be a strategy using a PCSHELL, but it would require you to assemble all the HYPRE objects yourself, so I would first try the first strategy.
Thanks, Pierre > On 29 Sep 2022, at 2:48 AM, Lucas Banting <banti...@myumanitoba.ca> wrote: > > > 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:https://www.research-collection.ethz.ch/bitstream/handle/20.500.11850/103394/geo2015-0013.1.pdf?sequence=2 > > <https://www.research-collection.ethz.ch/bitstream/handle/20.500.11850/103394/geo2015-0013.1.pdf?sequence=2> > My understanding of PETSc is that I can not mix complex and real scalars. Is > there a way I can assemble a parallel, real valued matrix, from my complex > PETSc matrix and use it with HYPRE? > > I understand that I can do this by using a real build of PETSc (like MFEM > does), but would prefer to keep using the complex build of PETSc as that is > what the rest of my application uses. > > Thanks, > Lucas >
