Added more facts about the positive square root.

src/op/c-star/index.tex

@@ -5,7 +5,7 @@
 \input{./sub.tex}
 \input{./unitary.tex}
 \input{./sa.tex}
-\input{./order.tex}
 \input{./homomorphism.tex}
 \input{./gelfand.tex}
-\input{./cont.tex}
+\input{./cont.tex}
+\input{./order.tex}