You need the following src files. Save them in a folder named e.g. GraphTheory . GTv26.txt CMv26.txt GDv26.txt RGv26.txt SGv26.txt SIv26.txt VPv26.txt The main one is GTv26.txt When you read it into Maple it will read the others automatically. Before you read it into Maple set the current directory. If you are running windows the command will be something like this > currentdir("C:/Documents and Settings/Michael Monagan/Desktop/GraphTheory"); If you are running Maple in a Unix system use > currentdir("/home/mmonagan/GraphTheory"); Then execute > read "GTv26.txt"; This should read in all the other code files. To test it execute the following commands > G := Graph({{1,2},{2,3},{3,4},{4,1}}); > Edges(G); > DrawGraph(G); The src code contains Maple style help pages for each command which you can refer to. The following are demo files which you can open. You will need to set the current directory appropriately. GTdemo.mw GTdemo2.mw