--- /dev/null
+(**************************************************************************)
+(* ___ *)
+(* ||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 "datatypes_props/Sequent.ma".
+include "Track/inv.ma".
+include "PRed/defs.ma".
+
+theorem track_pred: \forall Q1,Q2,p1,p2,S1,S2. [Q1, p1, S1] => [Q2, p2, S2] \to
+ Track Q1 p1 S1 \to Track Q2 p2 S2.
+ intros 7; elim H; clear H Q1 Q2 p1 p2 S1 S2;
+ [ autobatch
+ | autobatch
+ | lapply linear track_inv_impw to H3; decompose; destruct; autobatch
+ | lapply linear track_inv_impr to H3; decompose; destruct; autobatch
+ | lapply linear track_inv_impi to H7; decompose; destruct; autobatch size = 7
+ | lapply linear track_inv_scut to H5; decompose; destruct; autobatch
+ | lapply linear track_inv_scut to H4; decompose; destruct;
+ lapply linear track_inv_lref to H6; decompose; autobatch
+ | lapply linear track_inv_scut to H4; decompose; destruct;
+ lapply linear track_inv_lref to H5; decompose; autobatch
+ | lapply linear track_inv_scut to H3; decompose; destruct;
+ lapply linear track_inv_prin to H5; destruct;
+ lapply linear rinj_inj to Hcut1; destruct; autobatch
+ | lapply linear track_inv_scut to H3; decompose; destruct;
+ lapply linear track_inv_prin to H4; destruct;
+ lapply linear linj_inj to Hcut; destruct; autobatch
+ | lapply linear track_inv_scut to H3; decompose; destruct;
+ lapply linear track_inv_impw to H4; decompose; destruct;
+ lapply linear track_inv_impr to H5; decompose; destruct; autobatch
+ ].
+qed.