Zulip Chat Archive

Stream: Copenhagen Masterclass 2023

Topic: universe issue in def of condensed


Kevin Buzzard (Jun 28 2023 at 21:20):

I note that we currently have

Condensed.{u, u_1, u_2} (C : Type u_1) [inst : CategoryTheory.Category C] : Type (max (max (max (u + 1) u_1) u) u_2)

That's a lot of universes. Is it true that when we talk about "condensed X" we always have X a large category? The universe of the solution isn't even optimally expressed, there's a u and u+1 in there.

Scott Morrison (Jun 28 2023 at 22:25):

If you don't specalize to large categories, you should at least change the order of universe parameters. u_1 if inferred from C, but u_2 is presumably the morphism level and so should come first.

Adam Topaz (Jun 29 2023 at 04:47):

fixed in #5574


Last updated: Dec 20 2023 at 11:08 UTC