include "ground/relocation/gr_tl_eq.ma".
include "ground/relocation/gr_sor.ma".
-(* RELATIONAL UNION FOR GENERIC RELOCATION MAPS ***********************************************************)
+(* RELATIONAL UNION FOR GENERIC RELOCATION MAPS *****************************)
-(* Properties with gr_eq *********************************************************)
+(* Constructions with gr_eq *************************************************)
(*** sor_eq_repl_back1 *)
corec lemma gr_sor_eq_repl_back_sn: