X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Freduction%2Fcrx.ma;h=818374e6e888966dc13903515346eb8f4749fe2e;hb=1f30483032488ac4df2310b68fe8146e05524fec;hp=6a4cbbb4e0f57556980db65df2fca77c06f54492;hpb=8ed01fd6a38bea715ceb449bb7b72a46bad87851;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/reduction/crx.ma b/matita/matita/contribs/lambdadelta/basic_2/reduction/crx.ma
index 6a4cbbb4e..818374e6e 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/reduction/crx.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/reduction/crx.ma
@@ -12,17 +12,17 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "basic_2/notation/relations/reducible_5.ma".
+include "basic_2/notation/relations/predreducible_5.ma".
 include "basic_2/static/sd.ma".
 include "basic_2/reduction/crr.ma".
 
-(* CONTEXT-SENSITIVE EXTENDED REDUCIBLE TERMS *******************************)
+(* REDUCIBLE TERMS FOR CONTEXT-SENSITIVE EXTENDED REDUCTION *****************)
 
 (* activate genv *)
 (* extended reducible terms *)
 inductive crx (h) (g) (G:genv): relation2 lenv term ≝
 | crx_sort   : ∀L,k,l. deg h g k (l+1) → crx h g G L (⋆k)
-| crx_delta  : ∀I,L,K,V,i. ⇩[0, i] L ≡ K.ⓑ{I}V → crx h g G L (#i)
+| crx_delta  : ∀I,L,K,V,i. ⇩[i] L ≡ K.ⓑ{I}V → crx h g G L (#i)
 | crx_appl_sn: ∀L,V,T. crx h g G L V → crx h g G L (ⓐV.T)
 | crx_appl_dx: ∀L,V,T. crx h g G L T → crx h g G L (ⓐV.T)
 | crx_ri2    : ∀I,L,V,T. ri2 I → crx h g G L (②{I}V.T)
@@ -33,21 +33,22 @@ inductive crx (h) (g) (G:genv): relation2 lenv term ≝
 .
 
 interpretation
-   "context-sensitive extended reducibility (term)"
-   'Reducible h g G L T = (crx h g G L T).
+   "reducibility for context-sensitive extended reduction (term)"
+   'PRedReducible h g G L T = (crx h g G L T).
 
 (* Basic properties *********************************************************)
 
-lemma crr_crx: ∀h,g,G,L,T. ⦃G, L⦄ ⊢ 𝐑⦃T⦄ → ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄.
-#h #g #G #L #T #H elim H -L -T // /2 width=1/ /2 width=4/
+lemma crr_crx: ∀h,g,G,L,T. ⦃G, L⦄ ⊢ ➡ 𝐑⦃T⦄ → ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃T⦄.
+#h #g #G #L #T #H elim H -L -T
+/2 width=4 by crx_delta, crx_appl_sn, crx_appl_dx, crx_ri2, crx_ib2_sn, crx_ib2_dx, crx_beta, crx_theta/
 qed.
 
 (* Basic inversion lemmas ***************************************************)
 
-fact crx_inv_sort_aux: ∀h,g,G,L,T,k. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T = ⋆k →
+fact crx_inv_sort_aux: ∀h,g,G,L,T,k. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃T⦄ → T = ⋆k →
                        ∃l. deg h g k (l+1).
 #h #g #G #L #T #k0 * -L -T
-[ #L #k #l #Hkl #H destruct /2 width=2/
+[ #L #k #l #Hkl #H destruct /2 width=2 by ex_intro/
 | #I #L #K #V #i #HLK #H destruct
 | #L #V #T #_ #H destruct
 | #L #V #T #_ #H destruct
@@ -59,14 +60,14 @@ fact crx_inv_sort_aux: ∀h,g,G,L,T,k. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T =
 ]
 qed-.
 
-lemma crx_inv_sort: ∀h,g,G,L,k. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃⋆k⦄ → ∃l. deg h g k (l+1).
+lemma crx_inv_sort: ∀h,g,G,L,k. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃⋆k⦄ → ∃l. deg h g k (l+1).
 /2 width=5 by crx_inv_sort_aux/ qed-.
 
-fact crx_inv_lref_aux: ∀h,g,G,L,T,i. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T = #i →
-                       ∃∃I,K,V. ⇩[0, i] L ≡ K.ⓑ{I}V.
+fact crx_inv_lref_aux: ∀h,g,G,L,T,i. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃T⦄ → T = #i →
+                       ∃∃I,K,V. ⇩[i] L ≡ K.ⓑ{I}V.
 #h #g #G #L #T #j * -L -T
 [ #L #k #l #_ #H destruct
-| #I #L #K #V #i #HLK #H destruct /2 width=4/
+| #I #L #K #V #i #HLK #H destruct /2 width=4 by ex1_3_intro/
 | #L #V #T #_ #H destruct
 | #L #V #T #_ #H destruct
 | #I #L #V #T #_ #H destruct
@@ -77,10 +78,10 @@ fact crx_inv_lref_aux: ∀h,g,G,L,T,i. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T =
 ]
 qed-.
 
-lemma crx_inv_lref: ∀h,g,G,L,i. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃#i⦄ → ∃∃I,K,V. ⇩[0, i] L ≡ K.ⓑ{I}V.
+lemma crx_inv_lref: ∀h,g,G,L,i. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃#i⦄ → ∃∃I,K,V. ⇩[i] L ≡ K.ⓑ{I}V.
 /2 width=6 by crx_inv_lref_aux/ qed-.
 
-fact crx_inv_gref_aux: ∀h,g,G,L,T,p. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T = §p → ⊥.
+fact crx_inv_gref_aux: ∀h,g,G,L,T,p. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃T⦄ → T = §p → ⊥.
 #h #g #G #L #T #q * -L -T
 [ #L #k #l #_ #H destruct
 | #I #L #K #V #i #HLK #H destruct
@@ -94,21 +95,21 @@ fact crx_inv_gref_aux: ∀h,g,G,L,T,p. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T =
 ]
 qed-.
 
-lemma crx_inv_gref: ∀h,g,G,L,p. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃§p⦄ → ⊥.
+lemma crx_inv_gref: ∀h,g,G,L,p. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃§p⦄ → ⊥.
 /2 width=8 by crx_inv_gref_aux/ qed-.
 
-lemma trx_inv_atom: ∀h,g,I,G. ⦃G, ⋆⦄ ⊢ 𝐑[h, g]⦃⓪{I}⦄ →
+lemma trx_inv_atom: ∀h,g,I,G. ⦃G, ⋆⦄ ⊢ ➡[h, g] 𝐑⦃⓪{I}⦄ →
                     ∃∃k,l. deg h g k (l+1) & I = Sort k.
 #h #g * #i #G #H
-[ elim (crx_inv_sort … H) -H /2 width=4/
+[ elim (crx_inv_sort … H) -H /2 width=4 by ex2_2_intro/
 | elim (crx_inv_lref … H) -H #I #L #V #H
   elim (ldrop_inv_atom1 … H) -H #H destruct
 | elim (crx_inv_gref … H)
 ]
 qed-.
 
-fact crx_inv_ib2_aux: ∀h,g,a,I,G,L,W,U,T. ib2 a I → ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ →
-                      T = ⓑ{a,I}W.U → ⦃G, L⦄ ⊢ 𝐑[h, g]⦃W⦄ ∨ ⦃G, L.ⓑ{I}W⦄ ⊢ 𝐑[h, g]⦃U⦄.
+fact crx_inv_ib2_aux: ∀h,g,a,I,G,L,W,U,T. ib2 a I → ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃T⦄ →
+                      T = ⓑ{a,I}W.U → ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃W⦄ ∨ ⦃G, L.ⓑ{I}W⦄ ⊢ ➡[h, g] 𝐑⦃U⦄.
 #h #g #b #J #G #L #W0 #U #T #HI * -L -T
 [ #L #k #l #_ #H destruct
 | #I #L #K #V #i #_ #H destruct
@@ -117,24 +118,24 @@ fact crx_inv_ib2_aux: ∀h,g,a,I,G,L,W,U,T. ib2 a I → ⦃G, L⦄ ⊢ 𝐑[h, g
 | #I #L #V #T #H1 #H2 destruct
   elim H1 -H1 #H destruct
   elim HI -HI #H destruct
-| #a #I #L #V #T #_ #HV #H destruct /2 width=1/
-| #a #I #L #V #T #_ #HT #H destruct /2 width=1/
+| #a #I #L #V #T #_ #HV #H destruct /2 width=1 by or_introl/
+| #a #I #L #V #T #_ #HT #H destruct /2 width=1 by or_intror/
 | #a #L #V #W #T #H destruct
 | #a #L #V #W #T #H destruct
 ]
 qed-.
 
-lemma crx_inv_ib2: ∀h,g,a,I,G,L,W,T. ib2 a I → ⦃G, L⦄ ⊢ 𝐑[h, g]⦃ⓑ{a,I}W.T⦄ →
-                   ⦃G, L⦄ ⊢ 𝐑[h, g]⦃W⦄ ∨ ⦃G, L.ⓑ{I}W⦄ ⊢ 𝐑[h, g]⦃T⦄.
+lemma crx_inv_ib2: ∀h,g,a,I,G,L,W,T. ib2 a I → ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃ⓑ{a,I}W.T⦄ →
+                   ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃W⦄ ∨ ⦃G, L.ⓑ{I}W⦄ ⊢ ➡[h, g] 𝐑⦃T⦄.
 /2 width=5 by crx_inv_ib2_aux/ qed-.
 
-fact crx_inv_appl_aux: ∀h,g,G,L,W,U,T. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T = ⓐW.U →
-                       ∨∨ ⦃G, L⦄ ⊢ 𝐑[h, g]⦃W⦄ | ⦃G, L⦄ ⊢ 𝐑[h, g]⦃U⦄ | (𝐒⦃U⦄ → ⊥).
+fact crx_inv_appl_aux: ∀h,g,G,L,W,U,T. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃T⦄ → T = ⓐW.U →
+                       ∨∨ ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃W⦄ | ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃U⦄ | (𝐒⦃U⦄ → ⊥).
 #h #g #G #L #W0 #U #T * -L -T
 [ #L #k #l #_ #H destruct
 | #I #L #K #V #i #_ #H destruct
-| #L #V #T #HV #H destruct /2 width=1/
-| #L #V #T #HT #H destruct /2 width=1/
+| #L #V #T #HV #H destruct /2 width=1 by or3_intro0/
+| #L #V #T #HT #H destruct /2 width=1 by or3_intro1/
 | #I #L #V #T #H1 #H2 destruct
   elim H1 -H1 #H destruct
 | #a #I #L #V #T #_ #_ #H destruct
@@ -146,6 +147,6 @@ fact crx_inv_appl_aux: ∀h,g,G,L,W,U,T. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ → T
 ]
 qed-.
 
-lemma crx_inv_appl: ∀h,g,G,L,V,T. ⦃G, L⦄ ⊢ 𝐑[h, g]⦃ⓐV.T⦄ →
-                    ∨∨ ⦃G, L⦄ ⊢ 𝐑[h, g]⦃V⦄ | ⦃G, L⦄ ⊢ 𝐑[h, g]⦃T⦄ | (𝐒⦃T⦄ → ⊥).
+lemma crx_inv_appl: ∀h,g,G,L,V,T. ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃ⓐV.T⦄ →
+                    ∨∨ ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃V⦄ | ⦃G, L⦄ ⊢ ➡[h, g] 𝐑⦃T⦄ | (𝐒⦃T⦄ → ⊥).
 /2 width=3 by crx_inv_appl_aux/ qed-.