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Fix interior facet permutations #3009

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merged 16 commits into from
Jan 24, 2024

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anzil
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@anzil anzil commented Jan 22, 2024

This PR is joint work with @michalhabera and supersedes #3000.

Non-symmetric assembled operators were observed for bilinear forms that combine e.g. Nedelec and Regge elements when interior facet integrals were present in the form.

This PR fixes post dof transformation during sub-block matrix/vector assembly for interior facet integrals.

@michalhabera michalhabera added the bug Something isn't working label Jan 22, 2024
@anzil anzil marked this pull request as ready for review January 22, 2024 11:32
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jhale commented Jan 23, 2024

Thanks for finding and fixing this subtle bug! There is a patch coming in with the aim of removing PETSc solvers from the tests; can you wait for that to come in and then update?

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jhale previously requested changes Jan 23, 2024
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Update tests to not use PETSc solves.

@jhale jhale dismissed their stale review January 24, 2024 12:00

This is related to PETSc's block assembler, so this test needs to be made optional based on PETSc's availability when we get there.

@jhale jhale added this pull request to the merge queue Jan 24, 2024
Merged via the queue into FEniCS:main with commit 3dea1f9 Jan 24, 2024
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3 participants