proposition: Lemma Omega_defeq : forall x : R, Omega x = true -> (PI / 2 <= x <= 3 * (PI / 2))%R.
proof: Proof. Proof with trivial. intro x; unfold Omega in |- *... case (Rle_dec (PI / 2) x); intro... case (Rle_dec x (3 * (PI / 2))); intros... split... elim diff_false_true... intro; elim diff_false_true... Qed.
imports: Bool Reals trajectory_const rrho trajectory_def constants ycngftys ycngstys Omega