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