notational change of lift, drop, and gget

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / reduction / cnr.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/reduction/cnr.ma b/matita/matita/contribs/lambdadelta/basic_2/reduction/cnr.ma
index 1a6ce5d319d6f2828c4005864c3b5fcbaac52ecf..c7064080846f8072912daaf70c694e7a6d5edad3 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/reduction/cnr.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/reduction/cnr.ma
@@ -25,7 +25,7 @@ interpretation
 
 (* Basic inversion lemmas ***************************************************)
 
-lemma cnr_inv_delta: â\88\80G,L,K,V,i. â\87©[i] L ≡ K.ⓓV → ⦃G, L⦄ ⊢ ➡ 𝐍⦃#i⦄ → ⊥.
+lemma cnr_inv_delta: â\88\80G,L,K,V,i. â¬\87[i] L ≡ K.ⓓV → ⦃G, L⦄ ⊢ ➡ 𝐍⦃#i⦄ → ⊥.
 #G #L #K #V #i #HLK #H
 elim (lift_total V 0 (i+1)) #W #HVW
 lapply (H W ?) -H [ /3 width=6 by cpr_delta/ ] -HLK #H destruct
@@ -89,7 +89,7 @@ lemma cnr_lref_free: ∀G,L,i. |L| ≤ i → ⦃G, L⦄ ⊢ ➡ 𝐍⦃#i⦄.
 qed.
 
 (* Basic_1: was only: nf2_csort_lref *)
-lemma cnr_lref_atom: â\88\80G,L,i. â\87©[i] L ≡ ⋆ → ⦃G, L⦄ ⊢ ➡ 𝐍⦃#i⦄.
+lemma cnr_lref_atom: â\88\80G,L,i. â¬\87[i] L ≡ ⋆ → ⦃G, L⦄ ⊢ ➡ 𝐍⦃#i⦄.
 #G #L #i #HL @cnr_lref_free >(drop_fwd_length … HL) -HL //
 qed.