first commit for lreq ...

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / relocation / lexs_length.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/relocation/lexs_length.ma b/matita/matita/contribs/lambdadelta/basic_2/relocation/lexs_length.ma
index c3626ee27c0260e2d4c04b0e032ebd64998ad453..c8d3536de1c6c53cabf21c13fc0dbb65cc8c00d7 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/relocation/lexs_length.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/relocation/lexs_length.ma
@@ -20,6 +20,6 @@ include "basic_2/relocation/lexs.ma".
 (* Forward lemmas on length for local environments **************************)
 
 (* Basic_2A1: includes: lpx_sn_fwd_length *)
-lemma lexs_fwd_length: ∀R,L1,L2,f. L1 ⦻*[R, f] L2 → |L1| = |L2|.
-#R #L1 #L2 #f #H elim H -L1 -L2 -f //
+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 //
 qed-.