Comment about squashing

This commit is contained in:
Smaug123
2024-04-13 18:16:29 +01:00
parent aba1f13646
commit 1cd47be72c

View File

@@ -27,7 +27,7 @@ Recall what the functor laws in this context are:
Note what we're *not* requiring of our instantiations: that they're somehow "fully preserving all the structure".
If \\(\mathcal{C}\\) has two objects \\(A\\) and \\(B\\), we're perfectly happy to instantiate both of them to the same type, as long as all the arrows keep composing correctly.
In particular, every category has a trivial instantiation to the universe where there's only one set \\(\emptyset\\), and only one arrow \\(\mathrm{id} : \emptyset \to \emptyset\\).
In particular, for example, our instantiation might squash away arbitrarily much of the category's structure: every category has a trivial instantiation to the universe where there's only one set \\(\emptyset\\), and only one arrow \\(\mathrm{id} : \emptyset \to \emptyset\\).
# Homomorphisms between diagrams