Monthly Math development meeting: 8/18/2022, 10 am ET

We’ve been having monthly Math meetings on the third Thursday of the month. The next one is Thursday, August 18, 2022, at 10 am ET.

This will last no more than one hour; if we need more time, we will schedule additional time.

This meeting is open to all those that currently contribute to the Math library or that would like to contribute to the Math library.

The direct Zoom link is: Launch Meeting - Zoom

I have a Google Calendar event set up if anyone wants it on their calendar. Please DM me with your Google handle if that’s of interest.


  • this is a chance to collaborate and coordinate efforts. We’re expecting everyone to be kind and courteous. And patient. We have a team with diverse backgrounds.
  • impactful decisions will not be made at these meetings. That will continue to be done online on these forums. The meetings are a good time to discuss and get on the same page, but the decision making will be done online where we can include the opinions of others that can’t make the meeting.
  • important discussions that happen at the meeting will be communicated back online on these forums. If they don’t make it back here, it wasn’t important. No one will be penalized for not being present at a meeting.

If there’s anything you know you want to talk about, please post here. This is a good time to request help from others if there’s expertise that you need.

Tagging people that may be interested: @Funko_Unko, @storopoli, @stevebronder, @jgaeb, @spinkney, @Bob_Carpenter, @rok_cesnovar, @wds15, @WardBrian, @Niko, @serban-nicusor, @WardBrian

I can’t believe we’ve been running this meeting since May 2019! I think I’ve only missed a couple so far.

I’ll be online and walking through issues, PRs, etc if no one else shows.

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Ha! I can’t get on zoom right now… I’m pulling up a different link.

Google Meet link:

I’m going to miss this one, going camping with the family!

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La di da. So many PRs. So many issues.

I’m just going to actively close ones that are stale and not moving.

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  1. Closed optimization by t4c1 · Pull Request #2551 · stan-dev/math · GitHub. @tadej, @stevebronder
  2. Looked at Multi normal derivatives by spinkney · Pull Request #2572 · stan-dev/math · GitHub. @spinkney, let me know what you want to do with the draft PR.
  3. Looked at [WIP] Update to Eigen 3.4 by SteveBronder · Pull Request #2583 · stan-dev/math · GitHub. Looks like it’s still a WIP. Needs some action?
  4. I’m looking at add 5-parameter diffusion drift; fixes #2584 by kendalfoster · Pull Request #2585 · stan-dev/math · GitHub now.

I’m jumping out of the video call for now. See you next month!