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 monoids in $\textbf{Rel}$ with respect to the Cartesian monoidal structure of Proposition 6.2.3.8.1 are called hypermonoids, and their theory is explored in 
. Similarly, the comonoids in $\textbf{Rel}$ are called hypercomonoids, and they are defined and studied in .
