include "ground/relocation/gr_tl_eq.ma".
include "ground/relocation/gr_sand.ma".
-(* RELATIONAL INTERSECTION FOR GENERIC RELOCATION MAPS ***********************************************************)
+(* RELATIONAL INTERSECTION FOR GENERIC RELOCATION MAPS **********************)
-(* Properties with gr_eq *)
+(* Constructions with gr_eq *************************************************)
(*** sand_eq_repl_back1 *)
corec lemma gr_sand_eq_repl_back_sn: