[petsc-users] User defined solver for PCMG

[Jed Brown]

"Pratapa, Phanisri P" <ppratapa at gatech.edu> writes:

> What I mean is that: I want to implement multigrid preconditioning on
> a new Krylov method that is not currently in PETSc. 

Sure, implement it as a KSP.  It's not difficult.

> For this, I was hoping that I could replace the KSPFGMRES smoother
> (default) 

I don't understand this statement.  FGMRES is not the default, nor is it
typically used as a smoother.  Do you want to change the smoother
(Chebyshev/SOR by default) or the Krylov accelerator?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 818 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20160517/dbba21fe/attachment.pgp>