X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fifr_unwind.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fifr_unwind.ma;h=21e4ac27fac27dea7ae8c91a9ed629b509f3d66a;hb=f5b6fd3125c0aefa1db23fbdd23b887fa964f385;hp=9bd4cd7c47f21e086d9798e24966f0b02c3c6cbf;hpb=00fca351072c2dba11b71c14b1169d303fd6836f;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma
index 9bd4cd7c4..21e4ac27f 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/ifr_unwind.ma
@@ -32,9 +32,9 @@ include "delayed_updating/syntax/path_depth_reverse.ma".
 
 (* Constructions with unwind ************************************************)
 
-theorem ifr_unwind_bi (f) (p) (q) (t1) (t2):
-        t1 Ïµ ð â t1â(pâð¦) â§¸â¬ ð â
-        t1 â¡ð[p,q] t2 â â¼[f]t1 â¡ð[âp,âq] â¼[f]t2.
+lemma ifr_unwind_bi (f) (p) (q) (t1) (t2):
+      t1 Ïµ ð â t1â(pâð¦) â§¸â¬ ð â
+      t1 â¡ð[p,q] t2 â â¼[f]t1 â¡ð[âp,âq] â¼[f]t2.
 #f #p #q #t1 #t2 #H1t1 #H2t1
 * #n * #H1n #Ht1 #Ht2
 @(ex_intro â¦ (ââ­q)) @and3_intro