X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Flpx_length.ma;h=2332d68aa113722ecf8ca76a2d8957376a1133ff;hp=1c416b934f9f6f59fc76ea810c54b02e2b8a5d3c;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lpx_length.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lpx_length.ma
index 1c416b934..2332d68aa 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lpx_length.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lpx_length.ma
@@ -19,5 +19,5 @@ include "basic_2/rt_transition/lpx.ma".
 
 (* Forward lemmas with length for local environments ************************)
 
-lemma lpx_fwd_length (h) (G): ∀L1,L2. ⦃G,L1⦄ ⊢ ⬈[h] L2 → |L1| = |L2|.
+lemma lpx_fwd_length (h) (G): ∀L1,L2. ❪G,L1❫ ⊢ ⬈[h] L2 → |L1| = |L2|.
 /2 width=2 by lex_fwd_length/ qed-.