Dear members, 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 H. 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/20120306/22b4cec9/attachment.htm>
