In 8.4: sage: F1 = NumberField(x,'b') sage: F2 = F1 sage: F1==F2 True sage: F1.is_isomorphic(F2) False
Oops. In the code the work is done in the line t = self.pari_polynomial().nfisisom(other.pari_polynomial()) which in this case returns [0], meaning that the element 0 in F1 satisfies the defining polynomial of F2. But the test which follows is t==0 which returns True. The problem is that t is a pari gen and Sage tries too hard to compare that with python 0. If the test is changed to "if t.sage() == 0" then it works OK. I will open a ticket to fix this and meanwhile add a work-around in my code, but I wonder if something could be changed in the pari/sage interface to make this not happen at all? John -- 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 https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
