[petsc-users] DMDA questions

[Jed Brown]

Xiangdong <epscodes at gmail.com> writes:
> Could you please expand it a little more on using DMCoarsenHookAdd to
> restrict a fine vector on a coarse grid? The only example I can find is
> ex48 in snes. It is not clear how the coarsen vector are generated from
> that example.

Look at the use in src/ts/impls/implicit/theta/theta.c
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