There was a bug in the Pynac/Singular interface. To cancel fractions a GCD is done via Singular. This was fixed 7 days ago in https://github.com/pynac/pynac/commit/fd180a9a82018e97c540950c1bbf083768f703ef and the new Pynac version has the fix, see https://trac.sagemath.org/ticket/22136
Regards, -- 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.
