Split equation for f over two lines.

Author: razor-x

tex/_model.tex

@@ -60,18 +60,22 @@ \section{Model}
   R_N = \frac{λ}{W L} \frac{1}{σ^N} ,
 \end{equation}
 and the function
-\begin{widetext}
-  \begin{equation}
-    \label{eq:f}
-    f = \re{ \left\{ \left(
-          2 \left[ \sqrt{1 + i ω τ} + \frac{λ}{2} \left( \frac{1}{r_0} + \frac{1}{r_L} \right) \right]
-          e^{\left( L / λ \right) \sqrt{1 + i ω τ}}
-          + \frac{λ^2}{r_0 r_L} \frac{
-              \sinh{ \left[ \left( L / λ \right) \sqrt{1 + i ω τ} \right] }}
-            {\sqrt{1 + i ω τ}}
-        \right)^{-1} \right\} } .
-  \end{equation}
-\end{widetext}
+\begin{multline}
+  \label{eq:f}
+  f = \re \left( \left\{
+        \vphantom{
+          \frac{
+            \sinh{ \left[ \left( L / λ \right) \sqrt{1 + i ω τ} \right] }
+          }{\sqrt{1 + i ω τ}}
+        }
+        2 \left[ \sqrt{1 + i ω τ} + \frac{λ}{2} \left( \frac{1}{r_0} + \frac{1}{r_L} \right) \right]
+        e^{\left( L / λ \right) \sqrt{1 + i ω τ}}
+        \right. \right. \\ \left. \left.
+        + \frac{λ^2}{r_0 r_L} \frac{
+            \sinh{ \left[ \left( L / λ \right) \sqrt{1 + i ω τ} \right] }
+          }{\sqrt{1 + i ω τ}}
+      \right\}^{-1} \right) .
+\end{multline}
 
 Note that $f$ is unitless and depends only on the scales $L / λ$, $ω τ$, and $λ / r_i$.
 The parameters $r_i$ with $i$ either $0$ for the left contact or $L$ for the right are