Dear all, I am currently implementing a multigrid solver for Maxwell's equations in 3D. The AFW smoother has excellent convergence properties for Maxwell's equations. I noticed that PCPATCH provides such types of smoothers. However, I am using the deal.II library to build the patches. PCPATCH seems only to support the PETSc DMPlex data structure. Is there a way to use PCPATCH with user defined patches?
Besides, I found that we can also use PCASM with user defined subdomains. Is there any performance difference between PCPATCH and PCASM? Thanks in advance. Best regards, Ce
