dolfinx
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Geometric Twogrid example
TODO:
- [ ] error computation or output on different levels to see effect
- [ ] tidy up code
Requires (and contains) https://github.com/FEniCS/dolfinx/pull/3363
Merge conflicts look relatively easy to fix - could you have a go @schnellerhase ?
There were a number of CI failures on the last run, although not our Ubuntu images.