--- Preliminary ---

Minutes of the PCSC meeting of June, 9th, 2026, 10:00 CEST
==============================================================

Present: Philippe Bourdin     (PB)
         Axel Brandenburg     (AB)
         Piyali Chatterjee    (PC)
         Matthias Rheinhardt  (MR)
         Jennifer Schober     (JS)
Guest:   Clara Dehman         (CD)

The meeting was held online with CD as a guest during point 4.

1. approval of the agenda

The agenda proposed by Philippe was approved.


2. secretary of the meeting

JS is the secretary and writes the minutes.


3. approval of the minutes of the meeting of 24 October 2025

The previous minutes on the branches for development initiated a
discussion, which was moved to the Discussion item on whether and
how (newslater) the discussion of branches for development should be
continuied; MR: rebased option (is now implemented into the source.sh
command, which automatically updates the user's .git/config file)
After a short discussion on the new rebase option, - using branches
for development, The minutes of the previous meeting were approved
unanimously.


4. next Pencil Code User Meeting (2026)

CD: We need to make up the schedule.

PB: The list of registered participants should be published. So far,
only six people have registered.

AB: Two people - at least Oksana and Axel's new postdoc - have a
conflicting cosmology meeting and might only be able to join partially.

AB: We should split up people who do/join tutorials, for example GPUs,
and others who do code development.

JS: Tutorials are important for new users, especially since there is no
school this time.

PB: Should we allow online participation? We should check with new people
which tutorial topics would be interesting for them. Add a text field to
the registration form: “Do you want to give a tutorial or science talk,
or would you like to learn about certain topics?”

MR: We should try to attract more new users; there are many competing codes.

AB: Admin tutorial: Right now, PB is the only person in charge of managing
users. It would be good to also give AB access to the svn server and to
have documentation on how to modify GitHub repository settings in case
of an emergency swap with the svn server. Instructions can be checked
in as readme_github. This discussion will be added to the agenda of the
PCUM. MR: An emergency plan is needed; something should be written down.

CD: One big room is booked for the whole week. Smaller rooms will also
be booked. Outside sessions are possible; CD will look for a portable
whiteboard.

AB: A preliminary agenda should be put on the website, and presentations
should be uploaded.

CD: Potentially, some people can be invited to the meeting, with travel
costs covered.

AB: Agenda for day 1: 
i) Welcome and history of PC (AB)
ii) Code development over the past years; maybe after the tutorials,
    or perhaps better on day 3 (MR)
iii) Introduction of participants

AB: Talks should not be too general. Theory should be verified with the PC.
CD should ask people to talk about topics close to PC.

CD: Addining a talk on physics-informed neural networks. MR says that
this is also used by a student in PC.

AB: Invite Kerstin Kunze again, as well as people from the PARODY code
for a dynamo discussion.

JS: Extra Zoom link for beginner tutorial, to take place on Monday. AB:
Alternatively, office hours during the PC.

CD: We should meet again at the beginning of August to finalize the
agenda, once registration has closed. Alternatively, we could use an
office hour.

CD: Conference dinner on Wednesday or Thursday, depending on the number
of participants. Lunch at a nearby cafeteria; tables probably cannot be
reserved. Excursion, potentially to a castle in town.


5. other business

- Office hours: 
The next PC Office Hours will exceptionally take place on Monday,
15 June 2026, at 3:30 pm.

- Newsletter:
Next newsletter should be finished by June 23 2026. AB will add more
papers; MR added a section on the rebase option. PB will add a section
on pc_build updates.


6. End of meeting

11:47 CEST