[petsc-users] PETSc.: Projection preconditioner as PCMG

[Abdul Hanan Sheikh]

Dear, 

I had to implement the projection preconditioner (P = I - A*R*(A_H)^1 *P) along with an standard preconditioner (M).
And I read in some thread of users list that multilevel preconditioner can better handled by PCMG too, thus  
I had tried to implement the later (M) as pre smoother, where as the earlier (P) as CGC in PCMG framework. 

1. Does it make sense ? 
or the coarse grid correction of PCMG only does this part: R*(A_H)^1 *P   ?? 
2. How can I adapt my projection preconditioner (P) as (P1 = I - A*R*(A_H)^1 *P + R*(A_H)^1 *P ) ? 

I hope made you to get my problem. Even sorry for not a good narration. 
Thank you in anticipation, 


Abdul Hanan

TechnischeUniversiteit Delft
Faculteit Elektrotechniek, Wiskunde en Informatica
Numerical Analysis 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120306/664951d5/attachment.htm>