fact: Definition spec_ni2 (a b c d : Z) (p : Qpositive) : Qpositive := Qpositive_mult (Q_tail (Qplus (Qmult a (Qpos p)) b)) (Qpositive_inv (Q_tail (Qplus (Qmult c (Qpos p)) d))).
imports: Coq(FunInd) QArithSternBrocot(Field_Theory_Q)