X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Flexs_length.ma;h=af1eb9177dace502501760bcdb86e28605ecfb03;hb=981599dd384b3424c60297ea3a64ab0af9788ea2;hp=972c773ed34b92954ccb6e89eb76bf52baa5d00d;hpb=86badc0111c3626c4a547d09302acc7e6a179dea;p=helm.git

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 972c773ed..af1eb9177 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/relocation/lexs_length.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/relocation/lexs_length.ma
@@ -20,7 +20,7 @@ include "basic_2/relocation/lexs.ma".
 (* Forward lemmas with length for local environments ************************)
 
 (* Basic_2A1: includes: lpx_sn_fwd_length *)
-lemma lexs_fwd_length: ∀RN,RP,f,L1,L2. L1 ⦻*[RN, RP, f] L2 → |L1| = |L2|.
+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-.