[petsc-users] Preconditioner in multigrid solver

Dear Petsc team, I have a question about the setting up of a multigrid solver. I would like yo use a PCG smoother, preconditioned with a mass matrix, just on the fine level. But when add the line for preconditioning the CG with the mass matrix my MG diverges. I have implemented the same

Re: [petsc-users] PCMG: level dependent smoothing steps

07 Uhr schrieb Pietro Benedusi via petsc-users mailto:petsc-users@mcs.anl.gov>>: Dear PETSc team, Is there a way to set the number of smoothing steps done inside a specific multigrid level l ? Something like: PCMGSetNumberSmoothDown<https://www.mcs.anl.gov/petsc/petsc-3.8/docs/m

[petsc-users] PCMG: level dependent smoothing steps

Dear PETSc team, Is there a way to set the number of smoothing steps done inside a specific multigrid level l ? Something like: