milestone update in ground_2 and basic_2A

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / etc_2A1 / sta / lstas_da.etc

diff --git a/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/sta/lstas_da.etc b/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/sta/lstas_da.etc
deleted file mode 100644 (file)
index 8b11d1d..0000000
--- a/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/sta/lstas_da.etc
+++ /dev/null
@@ -1,40 +0,0 @@
-(**************************************************************************)
-(*       ___                                                              *)
-(*      ||M||                                                             *)
-(*      ||A||       A project by Andrea Asperti                           *)
-(*      ||T||                                                             *)
-(*      ||I||       Developers:                                           *)
-(*      ||T||         The HELM team.                                      *)
-(*      ||A||         http://helm.cs.unibo.it                             *)
-(*      \   /                                                             *)
-(*       \ /        This file is distributed under the terms of the       *)
-(*        v         GNU General Public License Version 2                  *)
-(*                                                                        *)
-(**************************************************************************)
-
-include "basic_2/unfold/lstas.ma".
-include "basic_2/static/da_sta.ma".
-
-(* NAT-ITERATED STATIC TYPE ASSIGNMENT FOR TERMS ****************************)
-
-(* Properties on degree assignment for terms ********************************)
-
-lemma lstas_da_conf: ∀h,g,G,L,T,U,l1. ⦃G, L⦄ ⊢ T •*[h, l1] U →
-                     ∀l2. ⦃G, L⦄ ⊢ T ▪[h, g] l2 → ⦃G, L⦄ ⊢ U ▪[h, g] l2-l1.
-#h #g #G #L #T #U #l1 #H @(lstas_ind_dx … H) -U -l1 //
-#l1 #U #U0 #_ #HU0 #IHTU #l2 #HT
-<minus_plus /3 width=3 by da_sta_conf/
-qed-.
-
-(* Advanced inversion lemmas ************************************************)
-
-lemma lstas_inv_refl_pos: ∀h,G,L,T,l. ⦃G, L⦄ ⊢ T •*[h, l+1] T → ⊥.
-#h #G #L #T #l #H elim (lstas_inv_step_sn … H)
-#U #HTU #_ elim (sta_da_ge … (l+1) HTU) -U
-#g #l0 #HT #Hl0 lapply (lstas_da_conf … H … HT) -H
-#H0T lapply (da_mono … HT … H0T) -h -G -L -T
-#H elim (discr_x_minus_xy … H) -H
-[ #H destruct /2 width=3 by le_plus_xSy_O_false/
-| -Hl0 <plus_n_Sm #H destruct 
-]
-qed-.