Drafting mg for LDG-H#16
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amartinhuertas wants to merge 8 commits into
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Prolongation and restriction among skeleton lowest order space and bulk linear continuous space
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….jl into drafting_mg_for_hldg
strong symmetric stresses I need to perform more systematic numerical experiments, but there seems so far to be a very mild degradation in # iterations with h (with Darcy it reached asymptotic regime) When deactivating the projection Pm, there is still mild degradation in # iterations, but seems to be milder than with Pm. Finally, I am trying to precondition the operator corresponding to k=0. We know that with k=0 the formulation does not convergence to the true solution. Thus, not sure if this result is useful for preconditioning.
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cc @santiagobadia @ruizbaier
WIP ... PR not ready to be merged. Just exploratory.