proposition: Lemma Rsqr_evader_distance_pos : forall t : R, (0 <= Rsqr_evader_distance t)%R.
proof: Proof. intro; unfold Rsqr_evader_distance in |- *; apply Rplus_le_le_0_compat; apply Rle_0_sqr. Qed.
imports: Bool Reals trajectory_const rrho trajectory_def constants ycngftys ycngstys Omega