Isn't it a bit strange if in the documentation it says "NotImplementedError"?
http://doc.sagemath.org/html/en/reference/arithgroup/sage/modular/arithgroup/arithgroup_generic.html#sage.modular.arithgroup.arithgroup_generic.ArithmeticSubgroup.coset_reps Is it true that Sage cannot compute the representatives of Gamma(4) in Gamma(2)? Ralf -- 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.
