class JacobianPoint {

  JacobianPoint neg() {
    return new JacobianPoint(x, y.neg(), z);
  }

    JacobianPoint();
    JacobianPoint(JacobianPoint p);
    JacobianPoint(FP2Immutable x, FP2Immutable y, FP2Immutable z);
    JacobianPoint(ECP2 p);

}