Firedrake meeting 2025 09 10

Date and time 2025-09-10 1600 UTC

Action Items

1. Pick Chair and Minuter (LC 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. LC: Try to merge RNH' PR: Movable VOM
7. PB: Profile and speed up some tests (minutes, minutes)
8. CW: More testing configurations (minutes)
9. All: Go through issues and mark with "good first issue" for new MSc/PhD contributor projects.
10. LC: Deprecate .at() (minutes)

Agenda

Present: KS IM AG LC JHC PB

Apologies: CW DH

LC: Function.at deprecation

Almost there. Just needs updating the streamlines plotting - VOM is much slower than at because of reimmersion. Possibly can try projecting to a vector function space and pass to matplotlib streamplot.

petsctools.Appctx

• update: now we use a global stack and a context manager to set the current active appctx and pass it through to python petsc objects. The tests now include a complete example passing an appctx through to a python PC.
• PB: Firedrake currently does some processing of the appctx between MG levels. Check this is compatible with this kind of manipulation.

https://github.com/firedrakeproject/petsctools/pull/16

Merge PRs

Note that PRs put in this section should either be trivial or already have been reviewed. Discussion-worthy PRs should be separate agenda items.

Date of next meeting

1600 UTC 2025-09-24