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4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
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15 include "basic_2/rt_transition/cnx_cnx.ma".
16 include "basic_2/rt_computation/cpxs.ma".
18 (* UNBOUND CONTEXT-SENSITIVE PARALLEL RT-COMPUTATION FOR TERMS **************)
20 (* Inversion lemmas with normal terms ***************************************)
22 lemma cpxs_inv_cnx1: ∀h,o,G,L,T1,T2. ⦃G, L⦄ ⊢ T1 ⬈*[h] T2 → ⦃G, L⦄ ⊢ ⬈[h, o] 𝐍⦃T1⦄ →
24 #h #o #G #L #T1 #T2 #H @(cpxs_ind_dx … H) -T1
25 /5 width=8 by cnx_tdeq_trans, tdeq_trans/