Zulip Chat Archive

Stream: Is there code for X?

Topic: canonical functor into sheaves


Anthony Bordg (Aug 06 2024 at 14:06):

Is the canonical functor, i.e. the Yoneda embedding composed with the sheafification functor, defined in mathlib4?
The Yoneda embedding is CategoryTheory.yoneda, but for the sheafification functor I only found CategoryTheory.sheafification, which has values into a category of presheaves, not a category of sheaves.

Adam Topaz (Aug 06 2024 at 14:17):

We have docs#CategoryTheory.presheafToSheaf

Adam Topaz (Aug 06 2024 at 14:17):

and, of course, its adjoint docs#CategoryTheory.sheafToPresheaf


Last updated: May 02 2025 at 03:31 UTC