[petsc-users] Convergence is different with different processors

[w_ang_temp]

Hello,
    I use the same project, but I find that when different number of processors is choosed,
the convergence is different. For example, when the processors are 4, it is divergent; when
the processors are 8, it is convergent.
    So what is the reason?
    Thanks.
                                   Jim.
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