Use 'aligned' instead of 'eqnarray*' to match style in other places

chapters/functions.tex

@@ -1440,12 +1440,15 @@ \subsection{Using the Derivative Annotation}\label{using-the-derivative-annotati
 end fGeneralDer;
 \end{lstlisting}
 In the example above \lstinline!zeroDerivative=y! and \lstinline!zeroDerivative=offset! imply that
-\begin{eqnarray*}
-\frac{d}{dt}f(x(t),y(t),o(t))&=&\frac{\partial f}{\partial x}\frac{dx}{dt}+\frac{\partial f}{\partial y}\frac{dy}{dt}+\frac{\partial f}{\partial o}\frac{do}{dt}\\
-&=&\frac{\partial f}{\partial x}\frac{dx}{dt}+\frac{\partial f}{\partial y}\cdot 0+\frac{\partial f}{\partial o}\cdot 0\\
-&=&\frac{\partial f}{\partial x}\frac{dx}{dt}\\
-&=&fDer\cdot\frac{dx}{dt}
-\end{eqnarray*}
+\begin{equation*}
+\begin{aligned}
+\frac{d}{dt}f(x(t),y(t),o(t))
+&= \frac{\partial f}{\partial x}\frac{dx}{dt}+\frac{\partial f}{\partial y}\frac{dy}{dt}+\frac{\partial f}{\partial o}\frac{do}{dt}\\
+&= \frac{\partial f}{\partial x}\frac{dx}{dt}+\frac{\partial f}{\partial y}\cdot 0+\frac{\partial f}{\partial o}\cdot 0\\
+&= \frac{\partial f}{\partial x}\frac{dx}{dt}\\
+&= fDer\cdot\frac{dx}{dt}
+\end{aligned}
+\end{equation*}
 \end{nonnormative}
 
 \begin{itemize}
@@ -1493,12 +1496,15 @@ \subsection{Using the Derivative Annotation}\label{using-the-derivative-annotati
 effort of \lstinline!fg!.
 
 Therefore \lstinline!h! indirectly includes the derivative with respect to \lstinline!y! as follows:
-\begin{eqnarray*}
-\frac{d}{dt}fg(x(t))&=&\frac{d}{dt}f(x(t),g(x(t)))\\
-&=&\frac{\partial f}{\partial x}\frac{dx}{dt}+\frac{\partial f}{\partial y}\frac{\partial g}{\partial x}\frac{dx}{dt}\\
-&=&\left(\frac{\partial f}{\partial x}+\frac{\partial f}{\partial y}\frac{\partial g}{\partial x}\right)\frac{dx}{dt}\\
-&=&h(x,y)\frac{dx}{dt}
-\end{eqnarray*}
+\begin{equation*}
+\begin{aligned}
+\frac{d}{dt}fg(x(t))
+&= \frac{d}{dt}f(x(t),g(x(t)))\\
+&= \frac{\partial f}{\partial x}\frac{dx}{dt}+\frac{\partial f}{\partial y}\frac{\partial g}{\partial x}\frac{dx}{dt}\\
+&= \left(\frac{\partial f}{\partial x}+\frac{\partial f}{\partial y}\frac{\partial g}{\partial x}\right)\frac{dx}{dt}\\
+&= h(x,y)\frac{dx}{dt}
+\end{aligned}
+\end{equation*}
 \end{nonnormative}
 
 \subsection{Partial Derivatives of Functions}\label{partial-derivatives-of-functions}