Thanks a lot to both of you. The trick with "import sage.all" worked nicely.
Regarding the existing implementation of unordered rooted trees, it looks very much like what I need. Some of the programming is a bit over my head, so I don't think I'll be able to finish the implementation. Do you know what's missing/broken, and whether or not there are plans to complete it and include it in Sage? What kind of license is it under? Regards, Henrik Sperre Sundklakk P.S. Viviane Pons, what is "ot"? -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-combinat-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-combinat-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-combinat-devel. For more options, visit https://groups.google.com/d/optout.
