Improved knot table

Advanced/Knots/parts/table.tex

@@ -1,9 +1,10 @@
 \section{Table of Prime Knots}
-A knot's \textit{crossing number} is the minimal number of crossings its projection must contain. In general, it is very difficult to determine a knot's crossing number.
+A knot's \textit{crossing number} is the minimal number of crossings its projection must contain. \par
+Finding a knot's crossing number is a fairly difficult problem.
 
 \vspace{1mm}
 
-This table contains the 15 smallest prime knots, ordered by crossing number. \par
+This table contains the a 20 smallest prime knots, ordered by crossing number. \par
 Mirror images are not included, even if the mirror image produces a nonisomorphic knot.
 
 \vfill
@@ -11,39 +12,29 @@ Mirror images are not included, even if the mirror image produces a nonisomorphi
 % Images are from the appendix of the Knot book.
 {
 	\def\w{24mm}
-	\foreach \l/\c/\r in {%
-		{3_1}/{4_1}/{5_1},%
-		{5_2}/{6_1}/{6_2},%
-		{6_3}/{7_1}/{7_2},%
-		{7_3}/{7_4}/{7_5},%
-		{7_6}/{7_7}/{8_1}%
+	\newcounter{knotcounter}
+
+	\foreach \a in {%
+		{3_1},{4_1},{5_1},{5_2},%
+		{6_1},{6_2},{6_3},{7_1},%
+		{7_2},{7_3},{7_4},{7_5},%
+		{7_6},{7_7},{8_1},{8_2},%
+		{8_3},{8_4},{8_5},{8_6}%
 	}{
+		\stepcounter{knotcounter}
 		\hfill
 		\begin{minipage}{\w}
 		\begin{center}
-			\includegraphics[width=\linewidth]{knot table/\l.png} \par
+			\includegraphics[width=\linewidth]{knot table/\a.png} \par
 			\vspace{2mm}
-			{\huge $\l$}
+			{\huge $\a$}
 		\end{center}
 		\end{minipage}
-		\hfill
-		\begin{minipage}{\w}
-		\begin{center}
-			\includegraphics[width=\linewidth]{knot table/\c.png} \par
-			\vspace{2mm}
-			{\huge $\c$}
-		\end{center}
-		\end{minipage}
-		\hfill
-		\begin{minipage}{\w}
-		\begin{center}
-			\includegraphics[width=\linewidth]{knot table/\r.png} \par
-			\vspace{2mm}
-			{\huge $\r$}
-		\end{center}
-		\end{minipage}
-		\hfill~\par
-		\vspace{4mm}
+		\ifnum\value{knotcounter}=4
+			\hfill~\par
+			\vspace{4mm}
+			\setcounter{knotcounter}{0}
+		\fi
 	}
 }