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15 include "basic_2/notation/relations/preditnormal_4.ma".
16 include "static_2/syntax/theq.ma".
17 include "basic_2/rt_transition/cpm.ma".
19 (* NORMAL TERMS FOR HEAD T-UNUNBOUND RT-TRANSITION **************************)
21 definition cnh (h) (G) (L): predicate term ≝
22 λT1. ∀n,T2. ⦃G,L⦄ ⊢ T1 ➡[n,h] T2 → T1 ⩳ T2.
25 "normality for head t-unbound context-sensitive parallel rt-transition (term)"
26 'PRedITNormal h G L T = (cnh h G L T).
28 (* Basic properties *********************************************************)
30 lemma cnh_sort (h) (G) (L): ∀s. ⦃G,L⦄ ⊢ ⥲[h] 𝐍⦃⋆s⦄.
32 elim (cpm_inv_sort1 … H) -H #H #_ destruct //
35 lemma cnh_ctop (h) (G): ∀i. ⦃G,⋆⦄ ⊢ ⥲[h] 𝐍⦃#i⦄.
36 #h #G * [| #i ] #n #X #H
37 [ elim (cpm_inv_zero1 … H) -H *
39 | #Y #X1 #X2 #_ #_ #H destruct
40 | #m #Y #X1 #X2 #_ #_ #H destruct
42 | elim (cpm_inv_lref1 … H) -H *
44 | #Z #Y #X0 #_ #_ #H destruct
49 lemma cnh_zero (h) (G) (L): ∀I. ⦃G,L.ⓤ{I}⦄ ⊢ ⥲[h] 𝐍⦃#0⦄.
51 elim (cpm_inv_zero1 … H) -H *
53 | #Y #X1 #X2 #_ #_ #H destruct
54 | #m #Y #X1 #X2 #_ #_ #H destruct
58 lemma cnh_gref (h) (G) (L): ∀l. ⦃G,L⦄ ⊢ ⥲[h] 𝐍⦃§l⦄.
60 elim (cpm_inv_gref1 … H) -H #H #_ destruct //
63 lemma cnh_abst (h) (p) (G) (L): ∀W,T. ⦃G,L⦄ ⊢ ⥲[h] 𝐍⦃ⓛ{p}W.T⦄.
64 #h #p #G #L #W1 #T1 #n #X #H
65 elim (cpm_inv_abst1 … H) -H #W2 #T2 #_ #_ #H destruct
66 /1 width=1 by theq_pair/
69 lemma cnh_abbr_neg (h) (G) (L): ∀V,T. ⦃G,L⦄ ⊢ ⥲[h] 𝐍⦃-ⓓV.T⦄.
70 #h #G #L #V1 #T1 #n #X #H
71 elim (cpm_inv_abbr1 … H) -H *
72 [ #W2 #T2 #_ #_ #H destruct /1 width=1 by theq_pair/
73 | #X1 #_ #_ #H destruct