Ticket #9660 (closed defect: invalid)
Obtaining the string representation of a number field ideal takes too long
|Reported by:||jdemeyer||Owned by:||davidloeffler|
In order to obtain the string representation of an NumberFieldFractionalIdeal?, the class group of the number field is computed to determine whether or not the ideal is principal. This can take a very long time. For example, the following is essentially immediate:
sage: K.<zeta> = CyclotomicField(23) sage: F = K.ideal(2).factor()
But now, doing
takes a very long time.