+++ /dev/null
-(**************************************************************************)
-(* ___ *)
-(* ||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 "static_2/syntax/tdeq.ma".
-include "basic_2/rt_transition/cpm_drops.ma".
-
-(* T-BOUND CONTEXT-SENSITIVE PARALLEL RT-TRANSITION FOR TERMS ***************)
-
-(* Inversion lemmas with sort-irrelevant equivalence for terms **************)
-
-lemma cpm_tdeq_inv_lref_sn (n) (h) (G) (L) (i):
- ∀X. ⦃G,L⦄ ⊢ #i ➡[n,h] X → #i ≛ X →
- ∧∧ X = #i & n = 0.
-#n #h #G #L #i #X #H1 #H2
-lapply (tdeq_inv_lref1 … H2) -H2 #H destruct
-elim (cpm_inv_lref1_drops … H1) -H1 // * [| #m ]
-#K #V1 #V2 #_ #_ #H -V1
-elim (lifts_inv_lref2_uni_lt … H) -H //
-qed-.
-
-lemma cpm_tdeq_inv_atom_sn (n) (h) (I) (G) (L):
- ∀X. ⦃G,L⦄ ⊢ ⓪{I} ➡[n,h] X → ⓪{I} ≛ X →
- ∨∨ ∧∧ X = ⓪{I} & n = 0
- | ∃∃s. X = ⋆(⫯[h]s) & I = Sort s & n = 1.
-#n #h * #s #G #L #X #H1 #H2
-[ elim (cpm_inv_sort1 … H1) -H1
- cases n -n [| #n ] #H #Hn destruct -H2
- [ /3 width=1 by or_introl, conj/
- | <(le_n_O_to_eq n) [| /2 width=3 by le_S_S_to_le/ ] -n
- /3 width=3 by ex3_intro, or_intror/
- ]
-| elim (cpm_tdeq_inv_lref_sn … H1 H2) -H1 -H2 /3 width=1 by or_introl, conj/
-| elim (cpm_inv_gref1 … H1) -H1 -H2 /3 width=1 by or_introl, conj/
-]
-qed-.