Removed parts from Zhu citations.

src/op/c-star/homomorphism.tex

@@ -36,4 +36,11 @@
     
 \end{proof}
 
+\begin{theorem}
+\label{theorem:continuity-of-homomorphism-c-star}
+    Let $A, B$ be unital $C^*$-algebras and $\Phi: A \to B$ be a unital *-homomorphism, then $\Phi(A)$ is closed. 
+\end{theorem}
+\begin{proof}[Proof, {{\cite[Theorem 11.1]{Zhu}}}. ]
+\end{proof}
+