2014-12-03 3:24 UTC+01:00, Nathann Cohen <nathann.co...@gmail.com>: >> sage: a = CIF(RIF(0, 1), RIF(0, 1)) >> sage: a is a >> True >> sage: a == a >> False >> >> So equality is not even reflexive. > > Okay. Please never define a graph with these things as vertices :-D
+1 And for better behavior, we need troolean = {True, False, Unknown} In CIF it should be a == b returns - True if they are the same interval - False if they are disjoint - Unknown otherwise and then a != b would just be equivalent to "not (a == b)"... and still the no "false positive". Vincent -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.