Firedrake meeting 2025 12 16

Date and time 2025-12-16 1600 UTC+1

Action Items

1. Pick Chair and Minuter (PB to pick)
2. ALL: (ongoing) triage the open issues and confirm if they are indeed still open (and perhaps provide labels)
3. ALL: do things with SV's branches
4. DH: Email to Andreas to have 2 (+ others!!!) loopy PRs merged TODO: FIND OUT WHICH PRS THESE ARE
5. DH: Talk to GregVernon about PR#2116.
6. CW: More testing configurations (minutes)

Minutes

Present: DH, CW, LC, IM, AC, PB

Apologies:

Merge PRs

• CW: https://github.com/firedrakeproject/firedrake/pull/4762
  • Explicitly link MPI in setup.py, remove need to set environment variables. Good! Approved + Merged.
• CW: https://github.com/firedrakeproject/firedrake/pull/4754
  • Bizarre behaviour in Cofunction init regarding val/function_space. Approved + Merged.
  • Cofunction init deserves a refactor if anyone has the time and energy.
• CW: https://github.com/firedrakeproject/firedrake/pull/4758
  • Remove Loopy from Zenodo, Add rate limit that is necessary. Approved + Merged.
• CW: https://github.com/firedrakeproject/firedrake/pull/4780
  • Allow MeshGeometry to be None for extruded meshes. Approved + Pending Gusto.
• LC: https://github.com/firedrakeproject/firedrake/pull/4779
  • Apply simplifications for when we assemble combinations of Adjoint and Action. Approved + Merged.
  • Need to fix the ability to take action of coefficient and form in UFL - not in this PR.
• LC: https://github.com/firedrakeproject/firedrake/pull/4763
  • Small changes requested. Generally approved, can be merged when done.

Reviewing further PRs:

PB: Firedrake #4777 PB: FIAT #202

• Ensure Vector/Tensor/Mixed stays on the outside and the element inside is restricted.
• Merged.

LC: Firedrake #4739

• Symbolic Interpolation docs. Merged.

PB: Firedrake #4739

• Bug fix. Merged.

Date of next meeting

1600 UTC 2026-01-06