milestone update in ground_2 and basic_2A

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / etc_2A1 / tshf / chnf.etc

diff --git a/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/tshf/chnf.etc b/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/tshf/chnf.etc
deleted file mode 100644 (file)
index f6106d3..0000000
--- a/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/tshf/chnf.etc
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-(**************************************************************************)
-(*       ___                                                              *)
-(*      ||M||                                                             *)
-(*      ||A||       A project by Andrea Asperti                           *)
-(*      ||T||                                                             *)
-(*      ||I||       Developers:                                           *)
-(*      ||T||         The HELM team.                                      *)
-(*      ||A||         http://helm.cs.unibo.it                             *)
-(*      \   /                                                             *)
-(*       \ /        This file is distributed under the terms of the       *)
-(*        v         GNU General Public License Version 2                  *)
-(*                                                                        *)
-(**************************************************************************)
-
-notation "hvbox( L ⊢ break 𝐇𝐍 ⦃ term 46 T ⦄ )"
-   non associative with precedence 45
-   for @{ 'HdNormal $L $T }.
-
-include "basic_2/reduction/cpr_tshf.ma".
-
-(* CONTEXT-SENSITIVE WEAK HEAD NORMAL TERMS *********************************)
-
-definition chnf: lenv → predicate term ≝ λL. NF … (cpr L) tshf.
-
-interpretation
-   "context-sensitive head normality (term)"
-   'HdNormal L T = (chnf L T).
-
-(* Basic inversion lemmas ***************************************************)
-
-lemma chnf_inv_tshf: ∀L,T. L ⊢ 𝐇𝐍⦃T⦄ → T ≈ T.
-normalize /2 width=1/
-qed-.
-
-(* Basic properties *********************************************************)
-
-lemma tshf_thnf: ∀T. T ≈ T → ⋆ ⊢ 𝐇𝐍⦃T⦄.
-#T #HT #T2 #H elim (cpr_fwd_tshf1 … H) -H //
-#H elim H //
-qed.