\end{align*}
\end{section}
+ \begin{section}{Complex}
+ We sometimes want to conjugate complex numbers like
+ $\compconj{a+bi} = a - bi$.
+ \end{section}
+
\begin{section}{Cone}
The dual cone of $K$ is $\dual{K}$. Some familiar symmetric cones
are $\Rnplus$, $\Lnplus$, $\Snplus$, and $\Hnplus$. If cones