Look at the examples, for nonlinear problems look at src/snes/examples/tutorials/ex19.c for linear problems look at src/ksp/ksp/examples/tutorials/ ex45.c they are both translations of what use to be DMMG examples so should show you exactly what needs to be done.
Barry On Jun 17, 2012, at 5:27 AM, fdkong wrote: > Hi everyone, > > I has been developing some solvers with multigrid preconditioning built on > the top of Object DMMG. Now, I update Petsc from 3.2 to 3.3, and find that > there is no DMMG. I try to modify my code so that it can run on new Petsc. > But I don't know how to transfer my code. If directly modify code, it will > take me a lot of time. Even further, I cann't find any example on how to use > "PCMG". > > Regards, > ------------------ > Fande Kong > ShenZhen Institutes of Advanced Technology > Chinese Academy of Sciences >
