2025.10.2

What's Changed

• Ignore flaky old hotel link by @connorjward in #4630
• Add [docs] dependency in developer install instructions by @pbrubeck in #4633
• replace obsolete intersphinx by @dham in #4141
• Add PyOP2 API docs back to conf.py by @connorjward in #4636
• fix test_high_order_location_warped_interior_facet by @leo-collins in #4632
• BUG: fix reuse of matfree adjoint Interpolator by @pbrubeck in #4623
• test: skip regression/test_locate_cell.py::test_high_order_location_e… by @ksagiyam in #4642
• Fix Hessian calculation for NonlinearVariationalSolver block by @JHopeCollins in #4641
• BUG: Fix TransferManager reuse on VectorFunctionSpace components by @pbrubeck in #4649
• BUG: fix multigrid transfers for symmetric tensors by @pbrubeck in #4648
• Attach appctx to DirichletBCs by @pbrubeck in #4655
• Ksagiyam/disable temp by @ksagiyam in #4658
• Firedrake container on ARM by @connorjward in #4640
• Bug: Fix bcs for BaseFormOperator on MixedFunctionSpace by @pbrubeck in #4659
• Fix linkcheck by @connorjward in #4681
• BUG: Fix FormSum involving the output tensor by @pbrubeck in #4670
• Multicomponent demo update (into release) by @ABaierReinio in #4676
• Specialise G-ADOPT smoke tests for main and release by @connorjward in #4680
• Fix Thetis smoke tests by @connorjward in #4686
• Fix firedrake-check: tweak locations for cell location tests by @connorjward in #4692
• PCPatch: validate mesh overlap by @pbrubeck in #4684
• Add information about building with non-system MPIs by @connorjward in #4698
• Fix subfunction hessian by @JHopeCollins in #4705
• Leo/authors by @leo-collins in #4704
• Remove mailing list information from the website by @connorjward in #4691
• Fix Hypre auxiliary spaces by @pbrubeck in #4712
• Make VTK optional again by @connorjward in #4713
• fix Function._ad_assign_numpy for real space in parallel by @JHopeCollins in #4714
• Fix point evaluation API change by @leo-collins in #4675
• Fix the bug in implementing the AuxiliaryOperatorPC and add a note in… by @Molin-Han in #4717

New Contributors

• @Molin-Han made their first contribution in #4717

Full Changelog: 2025.10.1...2025.10.2

Firedrake: an automated finite element system

This release is specifically created to document the version of firedrake used in a particular set of experiments using Firedrake. Please do not cite this as a general source for Firedrake or any of its dependencies. Instead, refer to https://www.firedrakeproject.org/citing.html

2025.10.1

What's Changed

• Distinguish firedrake-configure links without leading to git conflicts by @connorjward in #4625
• pyproject.toml: add immutabledict by @ksagiyam in #4622
• Move ensemble parallelism links by @connorjward in #4626
• SLATE: prevent Cofunction reassembly by @pbrubeck in #4377

Full Changelog: 2025.10.0...2025.10.1

2025.10.0

What's Changed

Adjoint

• checkpointing bcs by @Ig-dolci in #4284
• Dham/abstract reduced functional by @dham in #3941

Interpolate/VertexOnlyMesh

• Dual interpolation from/into MixedFunctionSpace by @pbrubeck in #4197
• Cleanup Interpolate assembly by @pbrubeck in #4288
• Move __future__ interpolation into interpolation.py by @leo-collins in #4346
• Allow construction of interpolation matrix between a VertexOnlyMesh and its input-ordering by @leo-collins in #4341
• Make interpolate function avoid using Interpolator by @leo-collins in #4432
• Change VOM missing_points_behaviour API by @leo-collins in #4524
• Cell location on non-simplicial higher-order meshes by @leo-collins in #4517
• Fix for vom-to-vom permutation matrix on Vector-valued function spaces by @leo-collins in #4510
• Cell location on simplicial higher-order meshes by @leo-collins in #4484
• introduce PointEvaluator object by @leo-collins in #4516
• Remove Interpolator.interpolate by @leo-collins in #4531
• deprecate .at() by @leo-collins in #4543
• Warn users about interpolate expression renumbering by @leo-collins in #4572
• stop annotation inside PointEvaluator by @leo-collins in #4567
• Pass kwargs to Cofunction.interpolate by @pbrubeck in #4587
• Matfree adjoint interpolation by @pbrubeck in #4552
• Explicitly assemble the interpolate adjoint matrix by @pbrubeck in #4576
• MixedInterpolator by @pbrubeck in #4596

submesh

• submesh: allow for extracting codim-1 submeshes by @ksagiyam in #4329

petsctools

• Use petsctools package by @connorjward in #4194
• Import get_external_packages from petsctools not firedrake.petsc by @JHopeCollins in #4381
• Fixes for changes to petsctools OptionsManager API by @connorjward in #4418
• Use petsctools release by @connorjward in #4423
• Link to petsctools API documentation by @connorjward in #4569
• Use petsctools for citations by @connorjward in #4560

Ensemble

• EnsembleFunction and EnsembleFunctionSpace. by @JHopeCollins in #4025

Other

• BDDC: Fix block sizes by @pbrubeck in #4253
• Remove firedrake-install and friends by @connorjward in #4270
• Ksagiyam/rename sub elements by @ksagiyam in #4354
• use ufl.apply_coefficient_split() by @ksagiyam in #4349
• Speed up caching by @connorjward in #4383
• remove mesh.init() by @ksagiyam in #4201
• Change master to main (2) by @connorjward in #4445
• Stop casting Constants+domain to Real functions by @connorjward in #4497
• TSFC: Improved caching to remove ComponentTensors by @pbrubeck in #4503
• Avoid dat_version increment with riesz_representation("l2") by @jrmaddison in #4504
• Expunge Vector by @connorjward in #4499
• fix snes_linesearch_type l2 -> secant by @ksagiyam in #4525
• RestrictedFunctionSpace: support Fieldsplit, multigrid, and python PC by @pbrubeck in #4169
• FixAtPointBC: support bendy meshes by @pbrubeck in #4532
• MG: rediscretize with a different coarse_mat_type by @pbrubeck in #4538
• Extruded plotting fixes by @danshapero in #4553
• Add support for deflation via firedrake.DeflatedSNES by @pefarrell in #4558
• Fix coarsening for R space by @pbrubeck in #3814
• delete _from_cell_list by @leo-collins in #4557
• Coarsen SLATE Tensors by @pbrubeck in #2889
• VariationalSolver: support sub_mat_type by @pbrubeck in #4028
• Fix TransferManager reuse for mixed coefficients by @pbrubeck in #4600

Full Changelog: 2025.4.3...2025.10.0

2025.4.3

What's Changed

• Fix documentation issues by @dham in #4425
• Eikehmueller/gtmgpc restriction by @eikehmueller in #4373
• Clarify install docs by @connorjward in #4366
• Better check for VCS info in firedrake-zenodo by @connorjward in #4433
• firedrake-run-split-tests uses python3 so that it works in the Docker containers by @JHopeCollins in #4428
• Add initial Firedrake 26 information to the website by @connorjward in #4426
• Fix AUTHORS.rst by @connorjward in #4420
• Fix demo links by @pbrubeck in #4422
• payment links by @dham in #4435
• Dham/firedrake 25 payment by @dham in #4438
• Fix typos in point evaluation docs by @leo-collins in #4436
• Do not use Makefile for firedrake-check by @connorjward in #4391
• Knook/multicomponent by @KarsKnook in #4322
• Fix CI timeouts 🤞 by @connorjward in #4458
• Increase permissiveness of petsc_raises by @connorjward in #4449
• Acse ej321/gmsh demo update by @acse-ej321 in #4326
• document varying extrusion by changing coordinates by @dham in #4385
• Fix firedrake-check on macOS by @connorjward in #4466
• Avoid mpiexec -n 1 for firedrake-check by @connorjward in #4465
• Add extra guest info to Firedrake 25 page by @connorjward in #4472
• test for early cleanup of adjoint variables by @JHopeCollins in #4451
• Pbrubeck/fix/mg cofunction by @pbrubeck in #4474
• Demo created at Dartington Hall - Shape Optimization by @APaganini in #4307
• Fix broken Stokes test by @pbrubeck in #4469
• Do not set different cache directories per job by @connorjward in #4460
• Improve install docs by @connorjward in #4461
• Document solver options by @connorjward in #4434
• Dham/fix notebooks by @dham in #4323
• Add tests for 3D zany elements by @pbrubeck in #4459
• Dependency groups by @connorjward in #4463
• TensorFunctionSpace: support empty shape by @pbrubeck in #4470
• Amend .test_durations by @connorjward in #4464
• Change master to main (1) by @connorjward in #4444
• interpolate: sanitise submesh interpolate by @ksagiyam in #4482
• Fixes for making zenodo releases by @connorjward in #4488
• Revert "Dependency groups (#4463)" by @JHopeCollins in #4492
• Change abstract deadline for FD25 by @connorjward in #4501
• Debug external contributions by @connorjward in #4506
• link to proramme by @dham in #4523
• More flexible dockerfile and build dev containers on CI. by @JHopeCollins in #4533
• BaseFormAssembler: cast FormSum weights as numbers by @pbrubeck in #4534
• Fix typo in demo by @pbrubeck in #4520
• Use GitHub notebook preview instead of nbviewer by @connorjward in #4513
• Remove firedrake-jupyter Docker image as it is not used by @connorjward in #4512
• MassInvPC: update docstring by @pbrubeck in #4542
• Test FIAT empty permutations by @pbrubeck in #4468
• Add test durations back to CI by @connorjward in #4562
• Add a copy button to code snippets by @connorjward in #4563
• Remove dead links from Firedrake 25 conference by @connorjward in #4566
• Final updates to Firedrake 25 page by @connorjward in #4570
• Make VTK a hard dependency again by @connorjward in #4565
• Workflow changes now we have the new containers by @connorjward in #4539
• Use appropriate user in CI to avoid permissions errors on later runs by @connorjward in #4545
• Remove broken link to personal website by @connorjward in #4589
• Remove Sphinx version pin by @connorjward in #4599
• Also build dev containers for macOS by @connorjward in #4598
• Do not print out lots of caching and object finalisation info in CI by @connorjward in #4585
• Redo release workflow by @connorjward in #4609

New Contributors

• @acse-ej321 made their first contribution in #4326

Full Changelog: 2025.4.2...2025.4.3

Firedrake: an automated finite element system

This release is specifically created to document the version of firedrake used in a particular set of experiments using Firedrake. Please do not cite this as a general source for Firedrake or any of its dependencies. Instead, refer to https://www.firedrakeproject.org/citing.html

Firedrake: an automated finite element system

This release is specifically created to document the version of firedrake used in a particular set of experiments using Firedrake. Please do not cite this as a general source for Firedrake or any of its dependencies. Instead, refer to https://www.firedrakeproject.org/citing.html

2025.4.2

What's Changed

• Set version number to 2025.4.1 by @connorjward in #4355
• Set setuptools min version by @connorjward in #4357
• Fast diagonalization demo by @pbrubeck in #4309
• Fix homogeneous DirichletBC residual by @pbrubeck in #4370
• ImplicitMatrixContext: Fix dual space for matfree SLATE Inverse by @pbrubeck in #4360
• Fix typo in test by @pbrubeck in #4359
• ASM: support Extruded Periodic meshes by @pbrubeck in #4352
• Knook/EquationBC_GMG by @KarsKnook in #4338
• Add Firedrake 25 information to the website by @connorjward in #4371
• GTMGPC: use the new Interpolate by @pbrubeck in #4374
• Use petsc.org instead of mcs.anl.gov for PETSc links by @connorjward in #4379
• 'Fix' petsc raises by @connorjward in #4384
• Remove old link from docs by @JHopeCollins in #4417
• Bump PETSc and SLEPc versions by @connorjward in #4419
• bump pyadjoint dependency version by @dham in #4424

Full Changelog: 2025.4.1...2025.4.2

2025.4.1

What's Changed

• Point to PyPI version of Firedrake on website by @connorjward in #4266
• Fix linkcheck by @connorjward in #4269
• Release fixups by @connorjward in #4268
• Website hotfix by @connorjward in #4275
• Fix sdist by @connorjward in #4276
• Increment version number by @connorjward in #4280
• Add option to build Docker containers manually by @connorjward in #4272
• Only deploy master website in this repository by @connorjward in #4278
• Single source of truth by @connorjward in #4249
• Use correct hook to prepare firedrake-check for editable installs by @connorjward in #4289
• Add instruction to run pip cache remove firedrake by @connorjward in #4290
• Tighter solver tolerance for calculating Hessian taylor test by @JHopeCollins in #4291
• Fix docs banner by @connorjward in #4292
• Inc PETSc to 3.23.1 so macOs no longer needs to download CMake by @connorjward in #4277
• Add check for uncommitted changes to autogenerated files by @connorjward in #4281
• petsc4py docs hotfix by @connorjward in #4294
• Misc fixups by @connorjward in #4310
• cause actions to trigger when PR target is changed by @dham in #4312
• Put dual spaces in the manual by @indiamai in #4304
• Dham/status badge by @dham in #4311
• intersphinx the current fiat documentation by @dham in #4305
• pyproject: move spydump to script-files by @qbisi in #4301
• Fix license in pyproject.toml by @connorjward in #4324
• Fix typo in duals manual section by @indiamai in #4321
• demo for steady Boussinesq problem with integral constraints by @KarsKnook in #4318
• Fix minor typos in Boussinesq demo by @ABaierReinio in #4336
• Rckirby/patchdemo by @rckirby in #4317
• Fix Real space assembly by @pbrubeck in #4331
• Cjc/vp demo by @colinjcotter in #4320
• Add macOS compiler failure to install FAQ by @connorjward in #4345
• Use a different mirror to download apt packages by @connorjward in #4347
• Backport BC checkpointing fixes to release by @angus-g in #4351
• always() install system dependencies in CI by @connorjward in #4353
• SLATE: support dual space by @pbrubeck in #4342
• PETSc update by @connorjward in #4348

New Contributors

• @ABaierReinio made their first contribution in #4336

Full Changelog: 2025.4.0...2025.4.1

2025.4.0.post0

What's Changed

• Point to PyPI version of Firedrake on website by @connorjward in #4266
• Fix linkcheck by @connorjward in #4269
• Release fixups by @connorjward in #4268
• Website hotfix by @connorjward in #4275
• Fix sdist by @connorjward in #4276
• Increment version number by @connorjward in #4280

Full Changelog: 2025.4.0...2025.4.0.post0