(* *)
(**************************************************************************)
-include "static_2/syntax/teqo_teqx.ma".
+include "static_2/syntax/teqo_teqg.ma".
include "basic_2/rt_computation/cpxs_lsubr.ma".
include "basic_2/rt_computation/cpxs_cnx.ma".
include "basic_2/rt_computation/lpxs_cpxs.ma".
(* Forward lemmas with sort-irrelevant outer equivalence for terms **********)
lemma cpxs_fwd_sort (G) (L):
- ∀X2,s1. ❪G,L❫ ⊢ ⋆s1 ⬈* X2 → ⋆s1 ⩳ X2.
+ ∀X2,s1. ❪G,L❫ ⊢ ⋆s1 ⬈* X2 → ⋆s1 ~ X2.
#G #L #X2 #s1 #H
elim (cpxs_inv_sort1 … H) -H #s2 #H destruct //
qed-.
∀V1,i. ⇩[i] L ≘ K.ⓑ[I]V1 →
∀V2. ⇧[↑i] V1 ≘ V2 →
∀X2. ❪G,L❫ ⊢ #i ⬈* X2 →
- ∨∨ #i ⩳ X2 | ❪G,L❫ ⊢ V2 ⬈* X2.
+ ∨∨ #i ~ X2 | ❪G,L❫ ⊢ V2 ⬈* X2.
#I #G #L #K #V1 #i #HLK #V2 #HV12 #X2 #H
elim (cpxs_inv_lref1_drops … H) -H /2 width=1 by or_introl/
* #I0 #K0 #V0 #U0 #HLK0 #HVU0 #HU0
(* Basic_1: was just: pr3_iso_beta *)
lemma cpxs_fwd_beta (p) (G) (L):
∀V,W,T,X2. ❪G,L❫ ⊢ ⓐV.ⓛ[p]W.T ⬈* X2 →
- ∨∨ ⓐV.ⓛ[p]W.T ⩳ X2 | ❪G,L❫ ⊢ ⓓ[p]ⓝW.V.T ⬈* X2.
+ ∨∨ ⓐV.ⓛ[p]W.T ~ X2 | ❪G,L❫ ⊢ ⓓ[p]ⓝW.V.T ⬈* X2.
#p #G #L #V #W #T #X2 #H elim (cpxs_inv_appl1 … H) -H *
[ #V0 #T0 #_ #_ #H destruct /2 width=1 by teqo_pair, or_introl/
| #b #W0 #T0 #HT0 #HU
lemma cpxs_fwd_theta (p) (G) (L):
∀V1,V,T,X2. ❪G,L❫ ⊢ ⓐV1.ⓓ[p]V.T ⬈* X2 →
∀V2. ⇧[1] V1 ≘ V2 →
- ∨∨ ⓐV1.ⓓ[p]V.T ⩳ X2 | ❪G,L❫ ⊢ ⓓ[p]V.ⓐV2.T ⬈* X2.
+ ∨∨ ⓐV1.ⓓ[p]V.T ~ X2 | ❪G,L❫ ⊢ ⓓ[p]V.ⓐV2.T ⬈* X2.
#p #G #L #V1 #V #T #X2 #H #V2 #HV12
elim (cpxs_inv_appl1 … H) -H *
[ -HV12 #V0 #T0 #_ #_ #H destruct /2 width=1 by teqo_pair, or_introl/
lemma cpxs_fwd_cast (G) (L):
∀W,T,X2. ❪G,L❫ ⊢ ⓝW.T ⬈* X2 →
- ∨∨ ⓝW. T ⩳ X2 | ❪G,L❫ ⊢ T ⬈* X2 | ❪G,L❫ ⊢ W ⬈* X2.
+ ∨∨ ⓝW. T ~ X2 | ❪G,L❫ ⊢ T ⬈* X2 | ❪G,L❫ ⊢ W ⬈* X2.
#G #L #W #T #X2 #H
elim (cpxs_inv_cast1 … H) -H /2 width=1 by or3_intro1, or3_intro2/ *
#W0 #T0 #_ #_ #H destruct /2 width=1 by teqo_pair, or3_intro0/
lemma cpxs_fwd_cnx (G) (L):
∀T1. ❪G,L❫ ⊢ ⬈𝐍 T1 →
- ∀X2. ❪G,L❫ ⊢ T1 ⬈* X2 → T1 ⩳ X2.
-/3 width=5 by cpxs_inv_cnx1, teqx_teqo/ qed-.
+ ∀X2. ❪G,L❫ ⊢ T1 ⬈* X2 → T1 ~ X2.
+/3 width=5 by cpxs_inv_cnx1, teqg_teqo/ qed-.