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Grid overview page needs updates

A discussion on the mailing list revealed that some facts about grids on https://dune-project.org/doc/grids/ are outdated or wrong. Maybe we can collect this here and make an MR that corrects the data:

  • ALUGrid<2,*> is parallel (also for dimworld != dim ?)
  • UGGrid can not communicate over all codims, e.g. comm. over edges does not work.
  • UGGrid, the comment "UG with MPI: no more than one grid object of the same dim may be live at any given time" can be removed with 2.7
  • UGGrid is not an external library any more, but a dune module.
  • For the Metagrids, at least one sentence about what they provide or do should be added. In the code there is often no documentation at all.

Do you see more problems one this page?