Here's a breakdown of the differences between each PDF style:
| Style | Class | Font | Theorem Environments |
|---|---|---|---|
| Style 1 | book |
Alegreya Sans | tcbthm |
| Style 2 | book |
Alegreya Sans | amsthm |
| Style 3 | book |
Arno* | amsthm |
| Style 4 | book |
Computer Modern | amsthm |
*To be replaced with Linus Romer's Elemaints when it is released.
The identity natural transformation $\text{id}_{F}\colon F\Longrightarrow F$ of $F$ is the natural transformation consisting of the collection
The naturality condition for $\text{id}_{F}$ is the requirement that, for each morphism $f\colon A\to B$ of $\mathcal{C}$, the diagram
commutes, which follows from unitality of the composition of $\mathcal{C}$.
