X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Fcpxs_theq.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Fcpxs_theq.ma;h=22f20ecb0fd1241ae7b063764229e18dacd877ca;hb=397413c4196f84c81d61ba7dd79b54ab1c428ebb;hp=580f90ab2bd05b3454a730799f63efdf9c2a0588;hpb=24ba1bb3f67505d3e384747ff90d26d3996bd3f5;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cpxs_theq.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cpxs_theq.ma
index 580f90ab2..22f20ecb0 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cpxs_theq.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cpxs_theq.ma
@@ -33,7 +33,7 @@ qed-.
 (* Note: probably this is an inversion lemma *)
 (* Basic_2A1: was: cpxs_fwd_delta *)
 lemma cpxs_fwd_delta_drops: ∀h,o,I,G,L,K,V1,i. ⬇*[i] L ≘ K.ⓑ{I}V1 →
-                            ∀V2. ⬆*[⫯i] V1 ≘ V2 →
+                            ∀V2. ⬆*[↑i] V1 ≘ V2 →
                             ∀U. ⦃G, L⦄ ⊢ #i ⬈*[h] U →
                             #i ⩳[h, o] U ∨ ⦃G, L⦄ ⊢ V2 ⬈*[h] U.
 #h #o #I #G #L #K #V1 #i #HLK #V2 #HV12 #U #H