proposition: Lemma Incl_M_L_unfolded_auxiliary_5: forall (a b c d:Q), d - c<>0 -> (d-c)*((d - c) * (-1 / 2 - 1 / 2)) <= (d-c)*((b - a) * ((2 + 1) / 2 - 1 / 2)) -> -1 <= (b - a) / (d - c).
proof: Proof. intros a b c d Hdc. destruct (not_Qeq_inf _ _ Hdc); [ apply Incl_M_L_unfolded_auxiliary_52 | apply Incl_M_L_unfolded_auxiliary_51 ]; assumption. Qed.
imports: digits Raxioms RIneq QArithSternBrocot(R_addenda) Fourier_solvable_ineqs Bounded_M