X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Fcpr_drops.ma;h=afd2d3fda6e7a341cdcbf2407faf3e6d49899f4f;hb=f308429a0fde273605a2330efc63268b4ac36c99;hp=714ce2f458f4b5325faf3952d21e3dbbb8f28fde;hpb=747b42f3b9aac5487047f57742f1fcf05b56b57d;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma
index 714ce2f45..afd2d3fda 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cpr_drops.ma
@@ -19,10 +19,10 @@ include "basic_2/rt_transition/cpm_drops.ma".
 (* Advanced inversion lemmas ************************************************)
 
 (* Basic_2A1: includes: cpr_inv_atom1 *)
-lemma cpr_inv_atom1_drops: ∀h,I,G,L,T2. ⦃G, L⦄ ⊢ ⓪{I} ➡[h] T2 →
+lemma cpr_inv_atom1_drops: ∀h,I,G,L,T2. ⦃G,L⦄ ⊢ ⓪{I} ➡[h] T2 →
                            ∨∨ T2 = ⓪{I}
-                            | ∃∃K,V,V2,i. ⬇*[i] L ≡ K.ⓓV & ⦃G, K⦄ ⊢ V ➡[h] V2 &
-                                          ⬆*[⫯i] V2 ≡ T2 & I = LRef i.
+                            | ∃∃K,V,V2,i. ⬇*[i] L ≘ K.ⓓV & ⦃G,K⦄ ⊢ V ➡[h] V2 &
+                                          ⬆*[↑i] V2 ≘ T2 & I = LRef i.
 #h #I #G #L #T2 #H elim (cpm_inv_atom1_drops … H) -H *
 [ /2 width=1 by or_introl/
 | #s #_ #_ #H destruct
@@ -33,10 +33,10 @@ qed-.
 
 (* Basic_1: includes: pr0_gen_lref pr2_gen_lref *)
 (* Basic_2A1: includes: cpr_inv_lref1 *)
-lemma cpr_inv_lref1_drops: ∀h,G,L,T2,i. ⦃G, L⦄ ⊢ #i ➡[h] T2 →
+lemma cpr_inv_lref1_drops: ∀h,G,L,T2,i. ⦃G,L⦄ ⊢ #i ➡[h] T2 →
                            ∨∨ T2 = #i
-                            | ∃∃K,V,V2. ⬇*[i] L ≡ K. ⓓV & ⦃G, K⦄ ⊢ V ➡[h] V2 &
-                                        ⬆*[⫯i] V2 ≡ T2.
+                            | ∃∃K,V,V2. ⬇*[i] L ≘ K. ⓓV & ⦃G,K⦄ ⊢ V ➡[h] V2 &
+                                        ⬆*[↑i] V2 ≘ T2.
 #h #G #L #T2 #i #H elim (cpm_inv_lref1_drops … H) -H *
 [ /2 width=1 by or_introl/
 | /3 width=6 by ex3_3_intro, or_intror/