Add Hiptmair multigrid PC #2707
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pefarrell
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@pbrubeck Please fix the conflicts and then I can review, thanks. |
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A Python PC implementing a two-level method arising from a Hiptmair decomposition.
Allows a user-provided tabulation of
grad(curl) to transfer scalar (vector) potentials inVcinto the target function spaceVf. This gives flexibility to use a sparse matrix for FDM elements, or to do it matrix-free viaInterpolator(grad(TestFunction(Vc)), Vf)when the transpose operation becomes available.