X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fstatic%2Ffrees_append.ma;h=42523bb395637591e9c0e89d191d2384241f50fe;hp=ce8d3480824fa6d7940439df86d12ede35205b87;hb=a454837a256907d2f83d42ced7be847e10361ea9;hpb=b4283c079ed7069016b8d924bbc7e08872440829

diff --git a/matita/matita/contribs/lambdadelta/static_2/static/frees_append.ma b/matita/matita/contribs/lambdadelta/static_2/static/frees_append.ma
index ce8d34808..42523bb39 100644
--- a/matita/matita/contribs/lambdadelta/static_2/static/frees_append.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/static/frees_append.ma
@@ -19,7 +19,7 @@ include "static_2/static/frees.ma".
 
 (* Properties with append for local environments ****************************)
 
-lemma frees_append_void: ∀f,K,T. K ⊢ 𝐅*⦃T⦄ ≘ f → ⓧ.K ⊢ 𝐅*⦃T⦄ ≘ f.
+lemma frees_append_void: ∀f,K,T. K ⊢ 𝐅+⦃T⦄ ≘ f → ⓧ.K ⊢ 𝐅+⦃T⦄ ≘ f.
 #f #K #T #H elim H -f -K -T
 [ /2 width=1 by frees_sort/
 | #f * /3 width=1 by frees_atom, frees_unit, frees_lref/
@@ -34,8 +34,9 @@ qed.
 
 (* Inversion lemmas with append for local environments **********************)
 
-fact frees_inv_append_void_aux: ∀f,L,T. L ⊢ 𝐅*⦃T⦄ ≘ f →
-                                ∀K. L = ⓧ.K → K ⊢ 𝐅*⦃T⦄ ≘ f.
+fact frees_inv_append_void_aux:
+     ∀f,L,T. L ⊢ 𝐅+⦃T⦄ ≘ f →
+     ∀K. L = ⓧ.K → K ⊢ 𝐅+⦃T⦄ ≘ f.
 #f #L #T #H elim H -f -L -T
 [ /2 width=1 by frees_sort/
 | #f #i #_ #K #H 
@@ -55,5 +56,5 @@ fact frees_inv_append_void_aux: ∀f,L,T. L ⊢ 𝐅*⦃T⦄ ≘ f →
 ]
 qed-.
 
-lemma frees_inv_append_void: ∀f,K,T. ⓧ.K  ⊢ 𝐅*⦃T⦄ ≘ f → K ⊢ 𝐅*⦃T⦄ ≘ f.
+lemma frees_inv_append_void: ∀f,K,T. ⓧ.K  ⊢ 𝐅+⦃T⦄ ≘ f → K ⊢ 𝐅+⦃T⦄ ≘ f.
 /2 width=3 by frees_inv_append_void_aux/ qed-.