2026.2.0

What's Changed

• Use DAGTraverser instead of MultiFunction for ufl2unicode by @connorjward in #481
• Bump version to 2026.2.0.dev0 by @jhale in #487
• Roll out fenicsx-refs.env system to CI workflows by @jhale in #488
• Bump actions/checkout from 6 to 7 by @dependabot[bot] in #491
• Minitypo by @massimiliano-leoni in #489
• Simplify trivial FormSum by @pbrubeck in #492
• Bump actions/setup-python from 6 to 7 by @dependabot[bot] in #498
• Formatting fixes with latest ruff by @jorgensd in #499
• Fix ZeroBaseForm holes in derivative expansion and action by @pbrubeck in #494
• Fix generic terminal traversal for BaseForm types in extract_domains by @pbrubeck in #502
• Cancel contractions of the Jacobian with its inverse by @pbrubeck in #496
• Install dolfinx dependencies on CI with group by @jorgensd in #505
• Use the accessed sub-element's degree for indexed mixed-element components by @garth-wells in #503
• Reduce the estimated degree only on simplex cells by @pbrubeck in #506
• Extract linear combination from ufl-expression by @jorgensd in #504
• Further extensions to extract linear combination by @jorgensd in #507
• Improve/fix adjoint computation on mixed function space by @jorgensd in #508
• Introduce argument.reconstruct by @jorgensd in #509
• Fix Interpolate holes by @pbrubeck in #497
• Give each pull back an inverse by @pbrubeck in #511
• Evaluate interpolations on the reference cell in compute_form_data by @pbrubeck in #512
• Add a signature to ZeroBaseForm by @pbrubeck in #514
• Support string subdomain IDs by @pbrubeck in #493
• Fix complex comparison checking after index expansion by @pbrubeck in #516
• Fix complex arity checks for linear operators by @pbrubeck in #517

New Contributors

• @massimiliano-leoni made their first contribution in #489

Full Changelog: 2026.1.0...2026.2.0