Proof spec_Qquadratic_Qpositive_to_Q_nR_nR.

Lemma spec_Qquadratic_Qpositive_to_Q_nR_dL_unfolded :
forall (a b c d e f g h : Z) (p1 p2 : Qpositive),
Qmult
(Qplus
(Qplus
(Qplus (Qmult (Qmult a (Qpos (nR p1))) (Qpos (dL p2)))
(Qmult b (Qpos (nR p1)))) (Qmult c (Qpos (dL p2)))) d)
(Qinv
(Qplus
(Qplus
(Qplus (Qmult (Qmult e (Qpos (nR p1))) (Qpos (dL p2)))
(Qmult f (Qpos (nR p1)))) (Qmult g (Qpos (dL p2)))) h)) =
Qmult
(Qplus
(Qplus
(Qplus (Qmult (Qmult (a + b)%Z (Qpos p1)) (Qpos p2))
(Qmult b (Qpos p1))) (Qmult (a + b + c + d)%Z (Qpos p2)))
(b + d)%Z)
(Qinv
(Qplus
(Qplus
(Qplus (Qmult (Qmult (e + f)%Z (Qpos p1)) (Qpos p2))
(Qmult f (Qpos p1))) (Qmult (e + f + g + h)%Z (Qpos p2)))
(f + h)%Z)).