Hello again!!! > You're riight. After looking carefully at my definition of cy (the cyclic > order of the non zero group elements that give the cyclic order of the edges > around each vertext) I noticed that instead of A*C^-1 I had AC^1. Once I > corrected that everything works.
Cool. Mystery solved. > However shouldn't _check_embedding_validity detect that something was wrong > with my dictionary? I did give > > k12._check_embedding_validity() > > and sage returned True. This is totally right. For this reason, I created a new trac ticket [1] which contains some new code for Sage: it will be able to catch the bug you encountered, and will raise much more meaningful messages than 'True/False' when something does not occur as expected. In your case, the code would break at this moment: sage: k12.set_embedding(imb) ... ValueError: The list associated with vertex A contains >1 occurrences of: [C] Now here is the deal: new code, when it is written, must be reviewed. Consequently, it will not be merged into Sage before somebody comes, reads it and checks that it all works, then sets the ticket to positive_review. This is a lot of work and things to learn when you do not know Sage's workflow, but on the other hand nobody can add anything into Sage unless somebody volunteers to do that job. If you were willing to give it a try it would definitely help get this patch reviewed+merged quickly. Some documentation to start the sage-development-adventure can be found there: http://www.sagemath.org/doc/developer/ > Anyway sorry for my silly mistake and thanks a lot for your help. Look at what happened: you found Sage misbehaving somewhere, asked a question, and as a result Sage is being patched and will not make the same mistake again. That's how free software works, and if nobody reports the problems they just stay as they are. Thanks for the report, and thanks for your help and time if you have some to spare for Sage. Good evening, Nathann [1] http://trac.sagemath.org/ticket/17656 -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
