-(**************************************************************************)
-(* ___ *)
-(* ||M|| *)
-(* ||A|| A project by Andrea Asperti *)
-(* ||T|| *)
-(* ||I|| Developers: *)
-(* ||T|| The HELM team. *)
-(* ||A|| http://helm.cs.unibo.it *)
-(* \ / *)
-(* \ / This file is distributed under the terms of the *)
-(* v GNU General Public License Version 2 *)
-(* *)
-(**************************************************************************)
-
-include "models/q_shift.ma".
-
-lemma q_cmp2:
- ∀a,b:ℚ.a < b ∨ b ≤ a.
-intros; cases (q_cmp a b);
-[1: right; apply q_eq_to_le; symmetry; assumption;
-|2: left; assumption;
-|3: right; apply q_lt_to_le; assumption;]
-qed.
-
-
-
-lemma value_skip:
- ∀f,i,b,tl. bars f = b::tl → start f + Qpos (\fst b) < i →
- \fst (value f i) = \fst (value (mk_q_f (start f + Qpos (\fst b)) tl) i).
-intros; cases (value f i); cases H2; clear H2;
-[1: cases (?:False); apply (q_lt_corefl (start f)); cases H3; clear H3 H4 H5;
- apply (q_lt_trans ???? H2);
-|2:
-simplify in ⊢ (? ? % ?);