--- /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/rt_computation/jsx_csx.ma".
+
+(* COMPATIBILITY OF STRONG NORMALIZATION FOR UNBOUND RT-TRANSITION **********)
+
+(* Main properties **********************************************************)
+
+theorem jsx_trans (h) (G): Transitive … (jsx h G).
+#h #G #L1 #L #H elim H -L1 -L
+[ #L2 #H
+ >(jsx_inv_atom_sn … H) -L2 //
+| #I #K1 #K #_ #IH #L2 #H
+ elim (jsx_inv_bind_sn … H) -H *
+ [ #K2 #HK2 #H destruct /3 width=1 by jsx_bind/
+ | #J #K2 #V #HK2 #HV #H1 #H2 destruct /3 width=1 by jsx_pair/
+ ]
+| #I #K1 #K #V #_ #HV #IH #L2 #H
+ elim (jsx_inv_void_sn … H) -H #K2 #HK2 #H destruct
+ /3 width=3 by rsx_jsx_trans, jsx_pair/
+]
+qed-.