Fixpoint Qquadratic_sign (a b c d e f g h : Z) (p1 p2 : Qpositive) {struct p1} :
  forall (H_Qquadratic_sg_denom_nonzero : Qquadratic_sg_denom_nonzero e f g h p1 p2),
  Z * (Z * (Z * (Z * Z)) * (Z * (Z * (Z * Z))) * (Qpositive * Qpositive)).Scheme Qquadratic_sg_denom_nonzero_inv_dep :=
  Induction for Qquadratic_sg_denom_nonzero Sort Prop.

Lemma Qquadratic_sign_equal : forall (a b c d e f g h : Z) (p1 p2 : Qpositive) (H1 H2 : Qquadratic_sg_denom_nonzero e f g h p1 p2), Qquadratic_sign a b c d e f g h p1 p2 H1 = Qquadratic_sign a b c d e f g h p1 p2 H2.