Progress over the past week.

src/topology/main/definition.tex

@@ -54,7 +54,7 @@
     Conversely, if $\cb \subset 2^X$ is a family such that:
     \begin{enumerate}
         \item[(TB1)] For every $x \in X$, there exists $U \in \cb$ such that $x \in U$.
-        \item[(TB2)] For every $x \in X$ and $U, V \in \cb$ such that $x \in U \cap$, there exists $W \in \cb$ such that $x \in W \subset U \cap V$.
+        \item[(TB2)] For every $x \in X$ and $U, V \in \cb$ such that $x \in U \cap V$, there exists $W \in \cb$ such that $x \in W \subset U \cap V$.
     \end{enumerate}
     then $\topo(\cb)$ is a topology on $X$, and $\cb$ is a base for $\topo(\cb)$.
 \end{definition}