Finish first draft of introduction and method section.

latex/sections/appendices.tex

@@ -3,7 +3,7 @@
 \begin{document}
 \appendix
 \section{The Crank-Nicholson method}\label{ap:crank_nicolson}
-The Crank-Nicolson \(CN\) approach considers both the forward difference, an explicit scheme,
+The Crank-Nicolson (CN) approach consider both the forward difference, an explicit scheme,
 \begin{equation*}
     \frac{u_{\ivec, \jvec}^{n+1} - u_{\ivec, \jvec}^{n}}{\Delta t} = F_{\ivec, \jvec}^{n} \ ,
 \end{equation*}