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Allow VectorElement to take a variant argument. #17

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pefarrell
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@wence-
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wence- commented Apr 7, 2020

Can you do this for TensorElement too, then I'll merge.

@@ -263,6 +263,8 @@ def __init__(self, family, cell=None, degree=None, dim=None,
viewed as k-form), ignored if family is a FiniteElement
quad_scheme
The quadrature scheme (optional), ignored if family is a FiniteElement
variant
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I think this needs a bit more explanation. I don't understand the docstring.

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This variant thing was first introduced to distinguish between GL, GLL, and equispaced Langrange elements without a profusion of names: Q, dQ, RTCE, RTCF, NCE, NCF type elements could be built from equispaced Lagrange as well as from spectral ingredients.

Later uses of this include RT and N1curl elements being available with different nodal basis, etc.

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For further reference, see this UFL issue and this UFL pull request.

@mscroggs mscroggs changed the base branch from main to mscroggs/variants January 4, 2023 16:03
@mscroggs mscroggs merged commit 5abf719 into FEniCS:mscroggs/variants Jan 4, 2023
garth-wells pushed a commit that referenced this pull request Jan 6, 2023
* add variant for MixedElement (#129)

* Allow VectorElement to take a variant argument. (#17)

Co-authored-by: Patrick Farrell <[email protected]>

Co-authored-by: Pablo Brubeck <[email protected]>
Co-authored-by: Patrick E. Farrell <[email protected]>
Co-authored-by: Patrick Farrell <[email protected]>
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5 participants