(* *)
(**************************************************************************)
+include "ground_2/xoa/ex_1_2.ma".
+include "ground_2/xoa/ex_4_3.ma".
include "ground_2/relocation/rtmap_coafter.ma".
include "static_2/notation/relations/rdropstar_3.ma".
include "static_2/notation/relations/rdropstar_4.ma".