Nils Bruin has addressed most of the points I was going to make, but I
did notice one minor thing in testing the new notebook - it actually
effects the old one too:
If you have a comment with a question mark, the question mark gets
parsed by the help system. I consider this undesirable
Hi:
I think I've implemented correctly plotting routines for the Rubik's cube.
Two examples are given at
http://sage.math.washington.edu/home/wdj/expository/ ,
if anyone is interested. They use Tom Boothby's polygon_plot3d code
which he emailed me. (Tom: I hope I am free to use it and add
a GPL
