X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2Fbasic_2%2Funwind%2Fsstas_sstas.ma;fp=matita%2Fmatita%2Fcontribs%2Flambda_delta%2Fbasic_2%2Funwind%2Fsstas_sstas.ma;h=03cbc46c7898e419bc2339daa7663bd1d4cdc52a;hb=5ea90cbbb01fe0bf3b77221d9e6c87002982621f;hp=9df5b0b47ed374058a4d4b1ce02ed67cd32a80cf;hpb=2f0626b0315cb0ca51aacb40234f02edd970524c;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/basic_2/unwind/sstas_sstas.ma b/matita/matita/contribs/lambda_delta/basic_2/unwind/sstas_sstas.ma
index 9df5b0b47..03cbc46c7 100644
--- a/matita/matita/contribs/lambda_delta/basic_2/unwind/sstas_sstas.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/unwind/sstas_sstas.ma
@@ -53,7 +53,7 @@ qed-.
 
 fact sstas_inv_lref1_aux: ∀h,g,L,T,U. ⦃h, L⦄ ⊢ T •*[g] U → ∀j. T = #j →
                           ∃∃I,K,V,W. ⇩[0, j] L ≡ K. ⓑ{I}V & ⦃h, K⦄ ⊢ V •*[g] W &
-                                     L ⊢ U ▼*[0, j + 1] ≡ W.
+                                     L ⊢ ▼*[0, j + 1] U ≡ W.
 #h #g #L #T #U #H @(sstas_ind_alt … H) -T
 [ #T #HUT #j #H destruct
   elim (ssta_inv_lref1 … HUT) -HUT * #K #V #W [2: #l] #HLK #HVW #HVT