(* Main properties with generic candidates of reducibility ******************)
-theorem csx_gcr: ∀h,o. gcr (cpx h) (tdeq h o) (csx h o) (csx h o).
-#h #o @mk_gcr //
+theorem csx_gcr: ∀h. gcr (cpx h) tdeq (csx h) (csx h).
+#h @mk_gcr //
[ /3 width=1 by csx_applv_cnx/
|2,3,6: /2 width=1 by csx_applv_beta, csx_applv_sort, csx_applv_cast/
| /2 width=7 by csx_applv_delta/