# jInvariant(EllipticCurve) -- A method to compute the j-invariant of an elliptic curve.

## Description

 i1 : E=ellCurve(3,8,GF(13)) o1 = Elliptic Curve defined by Y^2 = X^3 + 3 X + (-5)( over(GF 13 .)) o1 : EllipticCurve i2 : jInvariant(E) o2 = 3 o2 : GF 13