X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fs_transition%2Ffqu_length.ma;h=467283ff1f6975a9fd6f0ec26db748b22aac0b88;hp=c64b9ed5e5d5033ffbd7256dbf3b0a4253ca9d14;hb=222044da28742b24584549ba86b1805a87def070;hpb=09b4420070d6a71990e16211e499b51dbb0742cb

diff --git a/matita/matita/contribs/lambdadelta/basic_2/s_transition/fqu_length.ma b/matita/matita/contribs/lambdadelta/basic_2/s_transition/fqu_length.ma
index c64b9ed5e..467283ff1 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/s_transition/fqu_length.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/s_transition/fqu_length.ma
@@ -19,28 +19,13 @@ include "basic_2/s_transition/fqu.ma".
 
 (* Forward lemmas with length for local environments ************************)
 
-fact fqu_fwd_length_lref1_aux: ∀G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐ ⦃G2, L2, T2⦄ →
+fact fqu_fwd_length_lref1_aux: ∀b,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐[b] ⦃G2, L2, T2⦄ →
                                ∀i. T1 = #i → |L2| < |L1|.
-#G1 #G2 #L1 #L2 #T1 #T2 #H elim H -G1 -G2 -L1 -L2 -T1 -T2 // [2: #p]
-#I #G #L #V #T #j #H destruct
+#b #G1 #G2 #L1 #L2 #T1 #T2 #H elim H -G1 -G2 -L1 -L2 -T1 -T2 // [2,3: #p]
+#I #G #L #V #T [2: #_ ] #j #H destruct
 qed-.
 
-lemma fqu_fwd_length_lref1: ∀G1,G2,L1,L2,T2,i. ⦃G1, L1, #i⦄ ⊐ ⦃G2, L2, T2⦄ →
+lemma fqu_fwd_length_lref1: ∀b,G1,G2,L1,L2,T2,i. ⦃G1, L1, #i⦄ ⊐[b] ⦃G2, L2, T2⦄ →
                             |L2| < |L1|.
-/2 width=7 by fqu_fwd_length_lref1_aux/
+/2 width=8 by fqu_fwd_length_lref1_aux/
 qed-.
-
-(* Inversion lemmas with length for local environments **********************)
-
-fact fqu_inv_eq_aux: ∀G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐ ⦃G2, L2, T2⦄ →
-                     G1 = G2 → |L1| = |L2| → T1 = T2 → ⊥.
-#G1 #G2 #L1 #L2 #T1 #T2 * -G1 -G2 -L1 -L2 -T1 -T2
-[1: #I #G #L #V #_ #H elim (succ_inv_refl_sn … H)
-|5: #I #G #L #V #T #U #_ #_ #H elim (succ_inv_refl_sn … H)
-]
-/2 width=4 by discr_tpair_xy_y, discr_tpair_xy_x/
-qed-.
-
-lemma fqu_inv_eq: ∀G,L1,L2,T. ⦃G, L1, T⦄ ⊐ ⦃G, L2, T⦄ → |L1| = |L2| → ⊥.
-#G #L1 #L2 #T #H #H0 @(fqu_inv_eq_aux … H … H0) // (**) (* full auto fails *)
-qed-.