[petsc-users] Correlation between da_refine and pg_mg_levels

[Jed Brown]

Matthew Knepley <knepley at gmail.com> writes:
> I can't think why it would fail there, but DMDA really likes old numbers of
> vertices, because it wants
> to take every other point, 129 seems good. I will see if I can reproduce
> once I get a chance.

This problem uses periodic boundary conditions so even is right, but
Justin only defines the coarsest grid and uses -da_refine so it should
actually be irrelevant.
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