Forgotten m->q missed from earlier commit

main.tex

@@ -194,7 +194,7 @@ This condition expressed in terms of $R,C,D,r,c,d$ looks as follows:
 
 
 \noindent
-Expressing $c$ in terms of $m$ as defined in (eqn \ref{eqn-cintermsofm})
+Expressing $c$ in terms of $q$ as defined in (eqn \ref{eqn-cintermsofm})
 we get the following:
 
 \begin{sagesilent}