[petsc-users] How to implement multigrid preconditioning without DMMG

[fdkong]

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,
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Fande Kong
ShenZhen Institutes of Advanced Technology
Chinese Academy of Sciences
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