(* *)
(**************************************************************************)
-include "basic_2/grammar/lenv_length.ma".
+include "basic_2/syntax/lenv_length.ma".
include "basic_2/relocation/lexs.ma".
-(* GENERAL ENTRYWISE EXTENSION OF A CONTEXT-SENSITIVE REALTION FOR TERMS ****)
+(* GENERIC ENTRYWISE EXTENSION OF CONTEXT-SENSITIVE REALTIONS FOR TERMS *****)
-(* Forward lemmas on length for local environments **************************)
+(* Forward lemmas with length for local environments ************************)
(* Basic_2A1: includes: lpx_sn_fwd_length *)
-lemma lexs_fwd_length: ∀RN,RP,L1,L2,f. L1 ⦻*[RN, RP, f] L2 → |L1| = |L2|.
-#RM #RP #L1 #L2 #f #H elim H -L1 -L2 -f //
+lemma lexs_fwd_length: ∀RN,RP,f,L1,L2. L1 ⦻*[RN, RP, f] L2 → |L1| = |L2|.
+#RM #RP #f #L1 #L2 #H elim H -f -L1 -L2 //
+#f #I #L1 #L2 #V1 #V2 >length_pair >length_pair //
qed-.