Demonstrate how to use the multigrid solver as a preconditioner for GMRES(from PETSc). This demonstration is for the p-Multigrid solver to be used as the preconditioner of GMRES. The p-Multigrid is implemented in my high order CFD code - NFR.
jingchangshi/GMRES_PC_by_MG
Demonstrate how to use the multigrid solver as a preconditioner for GMRES(from PETSc)
Fortran