The difference of $X$ and $Y$ is the set $X\setminus Y$ defined by
\[ X\setminus Y \mathrel {\smash {\overset {\mathclap {\scriptscriptstyle \text{def}}}=}}\webleft\{ a\in X\ \middle |\ a\not\in Y\webright\} . \]
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 difference of $X$ and $Y$ is the set $X\setminus Y$ defined by
