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

[fdkong]

Hi Barry,


Thank you very much! Now, mg preconditioning works.


Date: Sun, 17 Jun 2012 11:57:27 -0500


>   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
>>  

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