On Sat, Feb 16, 2013 at 12:21 PM, w_ang_temp <w_ang_temp at 163.com> wrote:
> Is it true that BJacobi preconditioner is only one type of ASM > preconditioner(overlap=0), it is only one part of ASM? > I find that sometimes the two have the same results while sometimes > they are not. Is the reason that PETSc can > internally get the better parameter when using ASM, and sometimes it use > overlap=0 then ASM and BJacobi have the same > results. > If it is true, ASM is always better than BJacobi? > BJacobi is slightly more efficient to implement, but -pc_type asm -pc_asm_overlap 0 is block Jacobi. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130216/d7ddfc40/attachment.html>
