lemma cnv_appl_cpes (h) (a) (G) (L):
∀n. ad a n →
- â\88\80V. â¦\83G,Lâ¦\84 â\8a¢ V ![h,a] â\86\92 â\88\80T. â¦\83G,Lâ¦\84 ⊢ T ![h,a] →
- â\88\80W. â¦\83G,Lâ¦\84 ⊢ V ⬌*[h,1,0] W →
- â\88\80p,U. â¦\83G,Lâ¦\84 â\8a¢ T â\9e¡*[n,h] â\93\9b{p}W.U â\86\92 â¦\83G,Lâ¦\84 ⊢ ⓐV.T ![h,a].
+ â\88\80V. â\9dªG,Lâ\9d« â\8a¢ V ![h,a] â\86\92 â\88\80T. â\9dªG,Lâ\9d« ⊢ T ![h,a] →
+ â\88\80W. â\9dªG,Lâ\9d« ⊢ V ⬌*[h,1,0] W →
+ â\88\80p,U. â\9dªG,Lâ\9d« â\8a¢ T â\9e¡*[n,h] â\93\9b[p]W.U â\86\92 â\9dªG,Lâ\9d« ⊢ ⓐV.T ![h,a].
#h #a #G #L #n #Hn #V #HV #T #HT #W *
/4 width=11 by cnv_appl, cpms_cprs_trans, cpms_bind/
qed.
lemma cnv_cast_cpes (h) (a) (G) (L):
- â\88\80U. â¦\83G,Lâ¦\84 ⊢ U ![h,a] →
- â\88\80T. â¦\83G,Lâ¦\84 â\8a¢ T ![h,a] â\86\92 â¦\83G,Lâ¦\84 â\8a¢ U â¬\8c*[h,0,1] T â\86\92 â¦\83G,Lâ¦\84 ⊢ ⓝU.T ![h,a].
+ â\88\80U. â\9dªG,Lâ\9d« ⊢ U ![h,a] →
+ â\88\80T. â\9dªG,Lâ\9d« â\8a¢ T ![h,a] â\86\92 â\9dªG,Lâ\9d« â\8a¢ U â¬\8c*[h,0,1] T â\86\92 â\9dªG,Lâ\9d« ⊢ ⓝU.T ![h,a].
#h #a #G #L #U #HU #T #HT * /2 width=3 by cnv_cast/
qed.
(* Inversion lemmas with t-bound rt-equivalence for terms *******************)
lemma cnv_inv_appl_cpes (h) (a) (G) (L):
- â\88\80V,T. â¦\83G,Lâ¦\84 ⊢ ⓐV.T ![h,a] →
- â\88\83â\88\83n,p,W,U. ad a n & â¦\83G,Lâ¦\84 â\8a¢ V ![h,a] & â¦\83G,Lâ¦\84 ⊢ T ![h,a] &
- â¦\83G,Lâ¦\84 â\8a¢ V â¬\8c*[h,1,0] W & â¦\83G,Lâ¦\84 â\8a¢ T â\9e¡*[n,h] â\93\9b{p}W.U.
+ â\88\80V,T. â\9dªG,Lâ\9d« ⊢ ⓐV.T ![h,a] →
+ â\88\83â\88\83n,p,W,U. ad a n & â\9dªG,Lâ\9d« â\8a¢ V ![h,a] & â\9dªG,Lâ\9d« ⊢ T ![h,a] &
+ â\9dªG,Lâ\9d« â\8a¢ V â¬\8c*[h,1,0] W & â\9dªG,Lâ\9d« â\8a¢ T â\9e¡*[n,h] â\93\9b[p]W.U.
#h #a #G #L #V #T #H
elim (cnv_inv_appl … H) -H #n #p #W #U #Hn #HV #HT #HVW #HTU
/3 width=7 by cpms_div, ex5_4_intro/
qed-.
lemma cnv_inv_cast_cpes (h) (a) (G) (L):
- â\88\80U,T. â¦\83G,Lâ¦\84 ⊢ ⓝU.T ![h,a] →
- â\88§â\88§ â¦\83G,Lâ¦\84 â\8a¢ U ![h,a] & â¦\83G,Lâ¦\84 â\8a¢ T ![h,a] & â¦\83G,Lâ¦\84 ⊢ U ⬌*[h,0,1] T.
+ â\88\80U,T. â\9dªG,Lâ\9d« ⊢ ⓝU.T ![h,a] →
+ â\88§â\88§ â\9dªG,Lâ\9d« â\8a¢ U ![h,a] & â\9dªG,Lâ\9d« â\8a¢ T ![h,a] & â\9dªG,Lâ\9d« ⊢ U ⬌*[h,0,1] T.
#h #a #G #L #U #T #H
elim (cnv_inv_cast … H) -H
/3 width=3 by cpms_div, and3_intro/
lemma cnv_ind_cpes (h) (a) (Q:relation3 genv lenv term):
(∀G,L,s. Q G L (⋆s)) →
- (â\88\80I,G,K,V. â¦\83G,Kâ¦\84 â\8a¢ V![h,a] â\86\92 Q G K V â\86\92 Q G (K.â\93\91{I}V) (#O)) →
- (â\88\80I,G,K,i. â¦\83G,Kâ¦\84 â\8a¢ #i![h,a] â\86\92 Q G K (#i) â\86\92 Q G (K.â\93\98{I}) (#(↑i))) →
- (â\88\80p,I,G,L,V,T. â¦\83G,Lâ¦\84 â\8a¢ V![h,a] â\86\92 â¦\83G,L.â\93\91{I}Vâ¦\84⊢T![h,a] →
- Q G L V →Q G (L.ⓑ{I}V) T →Q G L (ⓑ{p,I}V.T)
+ (â\88\80I,G,K,V. â\9dªG,Kâ\9d« â\8a¢ V![h,a] â\86\92 Q G K V â\86\92 Q G (K.â\93\91[I]V) (#O)) →
+ (â\88\80I,G,K,i. â\9dªG,Kâ\9d« â\8a¢ #i![h,a] â\86\92 Q G K (#i) â\86\92 Q G (K.â\93\98[I]) (#(↑i))) →
+ (â\88\80p,I,G,L,V,T. â\9dªG,Lâ\9d« â\8a¢ V![h,a] â\86\92 â\9dªG,L.â\93\91[I]Vâ\9d«⊢T![h,a] →
+ Q G L V →Q G (L.ⓑ[I]V) T →Q G L (ⓑ[p,I]V.T)
) →
- (â\88\80n,p,G,L,V,W,T,U. ad a n â\86\92 â¦\83G,Lâ¦\84 â\8a¢ V![h,a] â\86\92 â¦\83G,Lâ¦\84 ⊢ T![h,a] →
- â¦\83G,Lâ¦\84 â\8a¢ V â¬\8c*[h,1,0]W â\86\92 â¦\83G,Lâ¦\84 â\8a¢ T â\9e¡*[n,h] â\93\9b{p}W.U →
+ (â\88\80n,p,G,L,V,W,T,U. ad a n â\86\92 â\9dªG,Lâ\9d« â\8a¢ V![h,a] â\86\92 â\9dªG,Lâ\9d« ⊢ T![h,a] →
+ â\9dªG,Lâ\9d« â\8a¢ V â¬\8c*[h,1,0]W â\86\92 â\9dªG,Lâ\9d« â\8a¢ T â\9e¡*[n,h] â\93\9b[p]W.U →
Q G L V → Q G L T → Q G L (ⓐV.T)
) →
- (â\88\80G,L,U,T. â¦\83G,Lâ¦\84â\8a¢ U![h,a] â\86\92 â¦\83G,Lâ¦\84 â\8a¢ T![h,a] â\86\92 â¦\83G,Lâ¦\84 ⊢ U ⬌*[h,0,1] T →
+ (â\88\80G,L,U,T. â\9dªG,Lâ\9d«â\8a¢ U![h,a] â\86\92 â\9dªG,Lâ\9d« â\8a¢ T![h,a] â\86\92 â\9dªG,Lâ\9d« ⊢ U ⬌*[h,0,1] T →
Q G L U → Q G L T → Q G L (ⓝU.T)
) →
- â\88\80G,L,T. â¦\83G,Lâ¦\84⊢ T![h,a] → Q G L T.
+ â\88\80G,L,T. â\9dªG,Lâ\9d«⊢ T![h,a] → Q G L T.
#h #a #Q #IH1 #IH2 #IH3 #IH4 #IH5 #IH6 #G #L #T #H
elim H -G -L -T [5,6: /3 width=7 by cpms_div/ |*: /2 width=1 by/ ]
qed-.