system to test them.
\end{section}
- \begin{section}{Miscellaneous}
- The cardinality of the set $X \coloneqq \set{1,2,3}$ is $\card{X}
- = 3$.
- \end{section}
-
\begin{section}{Proof by cases}
\begin{proposition}
\renewcommand{\baselinestretch}{1}
\end{section}
+ \begin{section}{Set theory}
+ The cardinality of the set $X \coloneqq \set{1,2,3}$ is $\card{X}
+ = 3$.
+ \end{section}
+
\begin{section}{Theorems}
\begin{corollary}
The