Fixed huge bug

Deserves at least 1000 nerd points

142.1.tex

@@ -157,7 +157,7 @@ \section{Sets}
 \begin{enumerate}
 \item \noindent $A_{i}$ is not empty: $\forall1\leq i\leq n\left(A_{i}\neq\emptyset\right)$.
 \item The $A_{i}$ cover $S$: $S=\cup_{i=1}^{n}A_{i}$.
-\item The $A_{i}$ are pairwise disjoint: $\forall1\leq i,j\leq n\left(A_{i}\cap A_{j}=\emptyset\implies i=j\right)$
+\item The $A_{i}$ are pairwise disjoint: $\forall1\leq i,j\leq n\left(i\neq j\implies A_{i}\cap A_{j}=\emptyset\right)$
 (or the contrapositive).
 \end{enumerate}