firedrakeproject/fiat: 2026.4.0

What's Changed

• tpe: rename sub_elements tensor_product_components by @ksagiyam in https://github.com/firedrakeproject/fiat/pull/148
• Proposal: use upstream UFL instead of the Firedrake fork by @connorjward in https://github.com/firedrakeproject/fiat/pull/147
• DO NOT SQUASH Merge release by @connorjward in https://github.com/firedrakeproject/fiat/pull/160
• Remove functional.index_iterator by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/157
• Lazy basis_tabulation by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/162
• GEM: improve style by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/164
• TensorProductCell: fix is_macrocell() method by @ksagiyam in https://github.com/firedrakeproject/fiat/pull/170
• DO NOT SQUASH merge release by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/173
• DO NOT SQUASH merge release into main by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/178
• Spectral KMV by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/177
• Unimplemented DualSet for TrimmedSerendipity by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/182
• Use petsctools for citations by @connorjward in https://github.com/firedrakeproject/fiat/pull/180
• DO NOT SQUASH Merge main by @connorjward in https://github.com/firedrakeproject/fiat/pull/188
• Tidy up workflows by @connorjward in https://github.com/firedrakeproject/fiat/pull/189
• DO NOT SQUASH Merge release by @connorjward in https://github.com/firedrakeproject/fiat/pull/191
• RestrictedElement: support restriction_domain=ridge by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/193
• Support ufl_element.quad_scheme by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/186
• Cleanup KMV quadratures by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/194
• COFFEE: optimise find_optimal_atomics by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/171
• gem: disable making temporaries for VariableIndexs by @ksagiyam in https://github.com/firedrakeproject/fiat/pull/195
• Adapt to UFL API changing methods to properties by @connorjward in https://github.com/firedrakeproject/fiat/pull/192
• Ksagiyam/merge release into main by @ksagiyam in https://github.com/firedrakeproject/fiat/pull/196
• Lumped mass quadrature scheme by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/197
• Ksagiyam/introduce mixed map mixed cell by @ksagiyam in https://github.com/firedrakeproject/fiat/pull/183
• BUG: fix KMV embedded degree by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/199
• overload BrokenElement.new to nest Broken-ness below Vector/Tensor/Mixed-ness by @JHopeCollins in https://github.com/firedrakeproject/fiat/pull/201
• RestrictedElement: nest inside MixedElement by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/202
• DO NOT SQUASH: merge release to main by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/204
• Fix quadrature docstrings by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/205
• QuadratureElement: construct directly from a QuadratureRule by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/187
• Walkington C1 macroelement by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/155
• Move MacroPolynomialSet to subclass to prevent infinite recursion errors by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/206
• Wu-Xu H3 non-conforming triangle by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/208
• Refactor functionals by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/209
• DualSet: BLAS3 optimization for IntegralMomentOfDerivative by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/210
• C2 (macro)elements by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/212
• Merge release into main (DO NOT SQUASH) by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/213
• Use constant moments for BernardiRaugel and GuzmanNeilan by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/203
• Introduce has_pointwise_dual_basis by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/200
• Merge release to main (DO NOT SQUASH) by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/214
• QuadratureElement: fix dimension check by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/215
• PhysicallyMappedElement: dual_transformation for more generic elements by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/217
• GEM: Simplify Indexed tensors by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/131
• Fix extract_subelement_component by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/122
• Unimplemented DualSet for BDMC by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/218
• High order BDFM by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/181
• Merge release to main [DO NOT SQUASH] by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/219
• Optimise find_optimal_atomics by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/221
• Optimise atomics for sum factorisation by @connorjward in https://github.com/firedrakeproject/fiat/pull/223
• Fix docstrings by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/225
• MTW tetrahedron by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/220
• Restrict PhysicallyMappedElement by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/226
• GEM: Optimise index replacement by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/227
• Clean up WuXuH3NCSpace by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/228
• NodalEnrichment with mismatching ExpansionSets by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/229
• Gem tabulation by @pbrubeck in https://github.com/firedrakeproject/fiat/pull/172
• Handle Real elements analogously to DG for tensor product cells by @connorjward in https://github.com/firedrakeproject/fiat/pull/233
• Revert "Handle Real elements analogously to DG for tensor product cells" by @connorjward in https://github.com/firedrakeproject/fiat/pull/236
• Handle Real elements analogously to DG for tensor product cells by @connorjward in https://github.com/firedrakeproject/fiat/pull/237
• Various repo cleanups by @connorjward in https://github.com/firedrakeproject/fiat/pull/234
• DO NOT SQUASH merge main by @connorjward in https://github.com/firedrakeproject/fiat/pull/241

New Contributors

• @JHopeCollins made their first contribution in https://github.com/firedrakeproject/fiat/pull/201

Full Changelog: https://github.com/firedrakeproject/fiat/compare/2025.4.2...2026.4.0