[petsc-dev] DM RefineLevel and CoarsenLevel

[Jed Brown]

Should the refinement level be copied over by DMCoarsen (and the coarsen
level be copied by DMRefine)?

It's useful for diagnostics to be able to define a universal level. If I
use PCMG and -snes_grid_sequence, there is effectively a sequence like

DMCreate(,&dm0); // r=0,c=0
DMRefine(dm0,&dmf); // r=1,c=0
DMCoarsen(dmf,&dmc); // r=0,c=1


I would like a way to identify dmc as being on the "same level" as dm0.
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