## Category Theory Community Server

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/uv6ppddg7frmmpy7iargsqxl/

(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.

$\;$

### 28 Responses to Category Theory Community Server

1. 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.

2. bhaugen says:

Yes, that join link has expired, and now zulip says an invitation is required to sign up.

• John Baez says:

There’s a new join link now, which should last for about 10 days.

• kentpalmer says:

is there a new link? or invite?

• John Baez says:

I’m updating the link now. This needs to be done every two weeks, or whenever anyone asks.

3. Ishan Dasgupta Samarendra says:

Dear Professor Baez
I would like to join the community on Zulip. Would it be possible for you to kindly update the link?

• John Baez says:

Okay, I updated it!

• Ishan Dasgupta Samarendra says:

Thank you very much!

5. Hello,

the link has expired again! Could it be updated?

Thx!

6. gasche says:

7. Dan Christensen says:

Since this seems to be the canonical place to get the link, can you update it again? Thanks!

• John Baez says:

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.

8. Jason Gross says:

Could you update it again? Thanks!

9. Marcelo Muniz Alves says:

10. Kyle says:

11. ct says:

12. John Baez says:

Okay, I’m doing it right now…