Optimize proof

1 files changed, 1 insertions, 1 deletions

diff --git a/library/topology/topological-space.tex b/library/topology/topological-space.tex
index 6ddf721..5209a13 100644
--- a/library/topology/topological-space.tex
+++ b/library/topology/topological-space.tex
@@ -291,7 +291,7 @@
         \end{subproof}
         $\closures{A}{X}$ is inhabited.
         For all $A' \in \closures{A}{X}$ we have $A \subseteq A'$.
-        Therefore $A \subseteq \inters{\closures{A}{X}}$.
+        Therefore $A \subseteq \inters{\closures{A}{X}}$ by \cref{subseteq_inters_iff}.
     \end{byCase}
 \end{proof}