My student Christian Williams has started a community server for category theory, computer science, logic, as well as general science and industry. In just a few days, it has grown into a large and lively place, with people of many backgrounds and interests. Please feel free to join!
Register here:
https://categorytheory.zulipchat.com/join/ivy2hose5nyxg3o75wks6wti/
(this link will expire in a while) and from then on you can just go here:
http://categorytheory.zulipchat.com
If the link for registration has expired, just let me know and I’ll revive it.
Azimuth 
We’re having a seminar on applied category theory at U. C. Riverside, organized by Joe Moeller and Christian Williams.
It will take place on Wednesdays at 5 pm UTC, which is 10 am in California or 1 pm on the east coast of the United States, or 6 pm in England.
We’ll have discussions on the Category Theory Community Server.
Yes, that join link has expired, and now zulip says an invitation is required to sign up.
There’s a new join link now, which should last for about 10 days.
is there a new link? or invite?
I’m updating the link now. This needs to be done every two weeks, or whenever anyone asks.
Dear Professor Baez
I would like to join the community on Zulip. Would it be possible for you to kindly update the link?
Many thanks in advance.
Okay, I updated it!
Thank you very much!
Prof. Can you please update the invitation link?
Okay, I updated it!
Hello,
the link has expired again! Could it be updated?
Thx!
Okay, I updated it!
The invitation link expired again.
Okay, I updated it!
Since this seems to be the canonical place to get the link, can you update it again? Thanks!
Hi! I updated it. We’ve got a lot of computer-related category theory going on there, and applied category theory, and various other kinds of category theory, including topos theory and just a bit of homotopy type theory.
Could you update it again? Thanks!
Done!
Dear John, could you please update the link to the community on Zullip? Thanks in advance
Okay!
Hi John, can you please update the link again? Thanks!
Yes!
Would you please update the link again?
Okay, I’m doing it right now…
Can you please update the link
Right now it’s working – it doesn’t need updating.
John Baez,
Could you please update the Zulip link?
Done!
Prof. Baez, could you please update the Zulip link? Thank you.
Yes! I did it.
Please update the link again, thank you !
Okay, I’ll do it right now!
Dear Prof. Baez,
Could you please update the Zulip link again?
Thank you!
Okay, I did it. Sorry for the delay—I was traveling.
The link needs to update again :\
Okay, I did it. Sorry for the delay—I was traveling.
Hi, could you update the link? Thanks!
Okay, I did it. Sorry for the delay—I was traveling.
Dear Professor Baez,
Could you please update the Zulip link in the post again?
Thank you in advance!
Okay, I did it. Sorry for the delay—I was traveling.
Hi Professor Baez,
Would you mind updating the link again? Thank you very much for your time.
Okay, I’m doing it now.
Dear Prof. Baez,
could you please update the link again? Thank you in advance!
I updated it. Have fun.
Hi Prof. Baez,
Could you please update the link again? Thanks very much!
Okay, done!
Dear Prof. Baez,
I feel very embarrassed to ask for updating the zulip-link, but there is no other way, right?
Thanks in advance,
Christian
Don’t be embarrassed! I’ll update it now.
Hi! The link seems to have expired. Could you kindly update it? Thanks.
Okay, I’ll do that now. Welcome to the club!
dear John, please could you update the link?
Okay, I’m doing it now!
Hi John,
Would it be possible to get that link updated once more?
Thanks a lot in advance,
MA
Okay, I updated it! Good luck and see you on the Category Theory Community Server!
Dear John Baez, i’m begining to use zulip and a bit lost in the process needed to succeed in order to access zulip category theory channel. Can you enlighten me ?
First you need to tell me to update the link on my blog article here: you can’t log in if the link has expired. Let’s pretend you just did that. I just updated the link.
Then click on the link on my blog article, where I say “Register here”.
It should be easy from there, but if not, tell me where you get stuck.
Hi Prof. Baez,
Could you please update the link again? Thanks very much!
I updated it!
Dear Prof. Baez
Could you please update the link again? Thanks!
I updated it. Good luck!
It seems that the link has again expired. Would you mind updating it again? Thank you very much!
Done!
It seems that the link has expired again. Can you please update it?
I’m updating it now!
It seems that the link has expired again. Can you please update it?
Okay, I’m doing it now. Good luck!