# \[JuliaManifolds\] Digital Community Call

**URL:** <https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378>\
**Category:** Community\
**Created:** [September 13, 2024, 4:10pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378 "2024-09-13T16:10:21Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [September 13, 2024, 4:10pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/1 "2024-09-13T16:10:21Z")

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I recently happily noticed that there is some increased activity around Manifolds in the Julia related social areas.

So I want to try to maybe move some of these discussions to a digital meeting. Everyone is welcome to join!

The idea is to discuss

- What’s new around Manifolds.jl and other JuliaManifolds packages?
- What are participants struggle with / need help with / want to discuss?
- What’s next? What’s your plans to contribute?

And for a first meeting or anyone joining anew also maybe a short introduction, if they want to – for a first meeting this then concerns everyone who wants to join.

As a first meeting time, I propose

**Tuesday, September 24, 17.00 (or 5 pm) CEST on zoom**

where my “What’s next?” topic will be Lie groups.

and will post a link soon (in case we move it a bit after feedback).

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [September 19, 2024, 6:43am UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/2 "2024-09-19T06:43:17Z")

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There was not much of feedback, so let’s keep the date.

Here is a generic link even for future Calls.

Topic: JuliaManifolds Community Call  
Time: This is a recurring meeting Meet anytime

Join Zoom Meeting

> **[Join our Cloud HD Video Meeting](https://ntnu.zoom.us/j/91533709562?pwd=bsQyRNmlaggzgkWx0FMAov90FTaaMG.1)**
>
> Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. Zoom Rooms is the original software-based conference...

Meeting ID: 915 3370 9562  
Passcode: 382898

So see you Tuesday.

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [September 24, 2024, 4:14pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/3 "2024-09-24T16:14:39Z")

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Thanks for everyone who tuned in today!

I will make this a monthly repeating thing, tentative next date 29/10.

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**Author:** ![goretkin](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/goretkin/32/167_2.png) [@goretkin](https://discourse.julialang.org/u/goretkin)\
**Post date:** [September 24, 2024, 6:31pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/4 "2024-09-24T18:31:54Z")

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I wish I had attended. Are there any meeting notes? What’s next for Lie groups?

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [September 25, 2024, 4:06am UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/5 "2024-09-25T04:06:39Z")

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No I did not take notes, since it was really just an informal discussion.

We discussed a bit all different `exp`s there are, and which ones will be the main ones in Lie groups. For that, we work on [GitHub - JuliaManifolds/LieGroups.jl: LieGroups.jl – WIP](https://github.com/JuliaManifolds/LieGroups.jl), slowly rethinking redoing the interface from the `GrouManifolds` as they were called when introduced in Manifolds.jl. The name is also still work-in-progress (see issue 1), and overall this total rework will still take quite a while.

But is was really nice and as you see, we already have a tentative next community call to join.

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**Author:** ![goretkin](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/goretkin/32/167_2.png) [@goretkin](https://discourse.julialang.org/u/goretkin)\
**Post date:** [September 25, 2024, 4:58am UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/6 "2024-09-25T04:58:13Z")

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Thanks for the summary. I would love to understand if there are different kinds of exp for the Lie Groups encountered in robotics (e.g. SO(3)). It is likely to affect my efforts toward developing an interface language for robotics, one that is built upon a kernel of mathematical understanding of the data. Kind of reminiscent of “symbolic reasoning”.

I’m looking for clarity on the “action spaces of robots”, and concretely I’m curious if the machinery and mathematical knowledge in the Manifolds Julia ecosystem could be helpful in a systematic and programmatic naming scheme for the different action spaces of a robot.

I’ll aim to join next time! Thanks!

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [September 25, 2024, 5:40am UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/7 "2024-09-25T05:40:44Z")

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Robotics is one of the reason I decided to even start the [LieGroups.jl](https://github.com/JuliaManifolds/LieGroups.jl) this year, though I can only work on that very much on the side. There were just too many things asked on Manifolds.  
Yes, that difference in `exp`s will also be described in more details in the Lie group docs as soon as I find time. But there is other people using Manifolds.jl for robotics.

I am not sure what you are referring to with “symbolic reasoning” nor with “action spaces of robots” but maybe that is also another topic than the announcement channel for JuliaManifolds Community calls should cover.

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [October 11, 2024, 5:57am UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/8 "2024-10-11T05:57:34Z")

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The next JuliaManifolds Community call will be on

**Tuesday, October 22, 2024, 17.00.**

The zoom link from before stays the same.

I will try to do one always on the Tuesday around the 20th of each month. Excluding December, where we can maybe do that a week earlier.

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [October 22, 2024, 4:20pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/9 "2024-10-22T16:20:59Z")

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That was a really nice meeting today.

Let’s already announce the next one – we will do another JulliaManifoldsCommunity Call on

**Tuesday, November 19, 2024, 17.00 CET (UTC+1)**

The zoom link will of course still stay the same. Feel free to post potential topics we could discuss. One that came up today is to discuss adjoints on Lie groups.

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<div class="post-metadata">

**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [November 14, 2024, 1:51pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/10 "2024-11-14T13:51:35Z")

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Sorry, we have to move the Community Call next week, since I can not make it on Tuesday (I have meetings until 18.00).

We could do Wednesday then instead (Nov 20th, still 17.00 CET/UTC+1)

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**Author:** ![j\_u](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/j_u/32/219081_2.png) [@j\_u](https://discourse.julialang.org/u/j_u)\
**Post date:** [November 20, 2024, 4:01pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/11 "2024-11-20T16:01:48Z")

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@kellertuer Despite my best efforts, I’m unable to attend today due to the new schedule and timing. However, as mentioned during the October 22nd meetup, I still hope to give a brief 5-minute presentation. Please extend my apologies to your colleagues so that no one feels put off. Thank you for your understanding.

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**Author:** ![j\_u](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/j_u/32/219081_2.png) [@j\_u](https://discourse.julialang.org/u/j_u)\
**Post date:** [January 5, 2025, 12:06pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/12 "2025-01-05T12:06:44Z")

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Hi (@kellertuer), I’d like to ask, is there a meetup (JuliaManifolds Digital Community Call) planned for this month? Where is the best place to check for the dates and times?

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [January 5, 2025, 12:38pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/13 "2025-01-05T12:38:28Z")

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We have note yet fixed it somuch yet.

There is also no there place than this thread to check for the times, since until now they were really just informal meetings not even with any topic ideas and/or schedule within the meetings.

For the next meeting, at least from my side, we would have to wait a bit until we can fix that, because my semester starts tomorrow and most of the week I will still fix appointments and get the weekly plan finalised. When that is finished, I can propose a meeting time.

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**Author:** ![j\_u](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/j_u/32/219081_2.png) [@j\_u](https://discourse.julialang.org/u/j_u)\
**Post date:** [January 5, 2025, 6:56pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/14 "2025-01-05T18:56:31Z")

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Thanks, I’ll be looking forward to the announcement.

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [January 13, 2025, 7:30pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/15 "2025-01-13T19:30:22Z")

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I would like to announce the next **JuliaManifolds Community call** on

**Tuesday January 21, 2025, at 17.00 (or 5pm) CET**

I do not have a concrete topic, maybe a bit of updates on LieGroups.jl developments. Otherwise just discussions of things going on, welcoming the new year, these things 🙂

The zoom link is the same as before.

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<div class="post-metadata">

**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [January 14, 2025, 9:39am UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/16 "2025-01-14T09:39:52Z")

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I was asked on slack to start at 16.00 (4pm) already. Sure we can do that. If you only join at 5, that is also fine. I will be there until maybe 17.30 then.

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**Author:** ![j\_u](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/j_u/32/219081_2.png) [@j\_u](https://discourse.julialang.org/u/j_u)\
**Post date:** [January 17, 2025, 4:38pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/17 "2025-01-17T16:38:28Z")

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Thanks, really appreciate. However, I can’t promise I will be able to attend. I have a trip planned for that day. I am trying to reschedule, but for now, it is still uncertain. I will try to make it on the 21st, and if not, then the next time.

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [March 3, 2025, 3:32pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/18 "2025-03-03T15:32:42Z")

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Sorry I got a bit carried away by the semester and missed to do a meeting end of February.

Should we maybe really fix something more regular? Maybe, having next week already in mind for a next meeting

**Every Second Tuesday of a month** , 17.00 CET (soon then CEST)?

The dates would be

- ~~March 11~~ March 18
- April 8
- May 13 (have to check but should hopefully work)
- June 10

Topic for next week: I am writing a “Get Started” tutorial for the forthcoming LieGroups.jl package; which in itself is slowly getting to a stable state, though a few things are still missing.

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**Author:** ![mateuszbaran](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mateuszbaran/32/221842_2.png) [@mateuszbaran](https://discourse.julialang.org/u/mateuszbaran)\
**Post date:** [March 3, 2025, 6:30pm UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/19 "2025-03-03T18:30:02Z")

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I’m usually available on Tuesdays at 17.00 CET/CEST but sadly not on March 11. March 18 would work for me though.

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [March 4, 2025, 7:40am UTC](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378/20 "2025-03-04T07:40:09Z")

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Sure, then we move the March one to March 18.

[Next page](https://discourse.julialang.org/t/juliamanifolds-digital-community-call/119378.md?page=2)