http://sage.math.canterbury.ac.nz/home/pub/246 (Sorry posted notebook and not published version.)
Linda, I wasn't able to access your notebook. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To post to this group, send email to sage-support@googlegroups.com. To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support?hl=en.
