FEniCS/basix

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FEniCSx finite element basis evaluation library

Stars: 145
Forks: 47
Open beginner issues: 0
Indexed issues: 39
Avg merge: 3h 5m
Merged PRs (30d): 8

Dominant language: C++
License: MIT
Last GitHub push: Aug 20, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Open All

39 open issues indexed

Test the cpp interface Open

enhancement testing

FEniCS/basix#129 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improve interpolation interface Open

enhancement performance

FEniCS/basix#189 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Provide interface to run Basix functions inside Numba-compiled kernels Open

enhancement performance

FEniCS/basix#201 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create pkg-config file Open

enhancement installation

FEniCS/basix#204 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
GLL points on a pyramid Open

bug enhancement

FEniCS/basix#268 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Remove duplicate tabulate functions Open

enhancement

FEniCS/basix#311 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Interpolation between spaces exploiting tensor product structure Open

enhancement performance

FEniCS/basix#356 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support all elements on all cell types Open

enhancement new-element

FEniCS/basix#429 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Transpose the data returned by `FiniteElement::tabulate` Open

enhancement

FEniCS/basix#513 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement a better method for evaluating Bernstein polynomials Open

enhancement

FEniCS/basix#538 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add support for macroelements Open

enhancement

FEniCS/basix#545 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Revise quadrature code Open

documentation enhancement task

FEniCS/basix#570 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add C-interface for some functionality Open

enhancement

FEniCS/basix#602 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Require GCC11 for full C++20 support Open

enhancement packaging testing

FEniCS/basix#607 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement quadrature rules from Witherden & Vincent paper Open

enhancement

FEniCS/basix#608 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Handle EnrichedElements better Open

enhancement

FEniCS/basix#633 · 3 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
Enable BuildJet ARM wheel builds Open

CI

FEniCS/basix#675 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Come up with sensible naming for macro polysets Open

proposal question

FEniCS/basix#689 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add discontinuous iso element Open

enhancement

FEniCS/basix#794 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"vertex" Quadrature elements Open

FEniCS/basix#831 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`mdspan` parentheses vs bracket operator Open

housekeeping

FEniCS/basix#842 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support float32 QuadratureElement Open

enhancement proposal

FEniCS/basix#848 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Tabulation of simple elements fail on an aarch64 machine Open

FEniCS/basix#852 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
C1 continuous functionspace (hermite) for interval and quad mesh in dolfinx Open

FEniCS/basix#869 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Allow elements with different numbers of DOFs associated with each edge, or throw an error when trying to create these Open

FEniCS/basix#870 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add logging using `spdlog` Open

enhancement proposal

FEniCS/basix#881 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add function that checks if elements defined on different cell types are compatible Open

FEniCS/basix#893 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Tensor elements built from vector-valued elements Open

FEniCS/basix#940 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Derivatives are missing in computation of DOF transformations Open

FEniCS/basix#941 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
nan values in derivatives on pyramid Open

enhancement

FEniCS/basix#945 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
1D implementation of div-conforming (BDM) elements Open

FEniCS/basix#947 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add Windows ARM wheel builds Open

FEniCS/basix#962 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Make DOLFINx integration tests using fenicsx-refs.yml Open

FEniCS/basix#963 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
test_macroedge(tet) fails on some hppa machines Open

FEniCS/basix#979 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement PEP735 dependency groups and PEP804 external dependencies Open

good first issue packaging python

FEniCS/basix#986 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Check complexes Open

FEniCS/basix#990 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Recreate a Basix element from a hash. Open

FEniCS/basix#999 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Change numbering of sub-entities? Open

proposal

FEniCS/basix#1020 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
create_custom_element fails LU factorization for specific anisotropic tensor-product entity layouts, independent of any rank deficiency Open

FEniCS/basix#1067 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

FEniCS/basix

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