--- /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 "basic_2/static/gcp.ma".
+include "basic_2/rt_transition/cnx_drops.ma".
+include "basic_2/rt_computation/csx_drops.ma".
+
+(* STRONGLY NORMALIZING TERMS FOR UNCOUNTED PARALLEL RT-TRANSITION **********)
+
+(* Main properties **********************************************************)
+
+theorem csx_gcp: ∀h,o. gcp (cpx h) (tdeq h o) (csx h o).
+#h #o @mk_gcp
+[ normalize /3 width=13 by cnx_lifts/
+| #G #L elim (deg_total h o 0) /3 width=8 by cnx_sort_iter, ex_intro/
+| /2 width=8 by csx_lifts/
+| /2 width=3 by csx_fwd_flat_dx/
+]
+qed.