Function: ellminimaldisc
Section: elliptic_curves
C-Name: ellminimaldisc
Prototype: G
Help: ellminimaldisc(E): E being an elliptic curve defined over a number
  field output by ellinit, return the minimal discriminant ideal of E.
Doc: $E$ being an elliptic curve defined over a number field output by
  \kbd{ellinit}, return the minimal discriminant ideal of E.