X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Frelocation%2Ffr2_nat_nat.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Frelocation%2Ffr2_nat_nat.ma;h=287e6cd58df32dd124d00eaad8e5c92168aeac89;hb=15a2da1b45b2fd34ac67dcb58fc4b94330d18a93;hp=c84990142f8c73b4661697b94c15d3b00168a327;hpb=6e4f8f6dc7ab7cdc0d9d852f6786947d3c4513cc;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/fr2_nat_nat.ma b/matita/matita/contribs/lambdadelta/ground/relocation/fr2_nat_nat.ma
index c84990142..287e6cd58 100644
--- a/matita/matita/contribs/lambdadelta/ground/relocation/fr2_nat_nat.ma
+++ b/matita/matita/contribs/lambdadelta/ground/relocation/fr2_nat_nat.ma
@@ -20,7 +20,7 @@ include "ground/relocation/fr2_nat.ma".
 
 (*** at_mono *)
 theorem fr2_nat_mono (f) (l):
-        ∀l1. @↑❨l, f❩ ≘ l1 → ∀l2. @↑❨l, f❩ ≘ l2 → l1 = l2.
+        ∀l1. ＠§❨l, f❩ ≘ l1 → ∀l2. ＠§❨l, f❩ ≘ l2 → l1 = l2.
 #f #l #l1 #H elim H -f -l -l1
 [ #l #x #H <(fr2_nat_inv_empty … H) -x //
 | #f #d #h #l #l1 #Hld #_ #IH #x #H