universary milestone in basic_2

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / computation / cpre.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/computation/cpre.ma b/matita/matita/contribs/lambdadelta/basic_2/computation/cpre.ma
index 6b998fb131999f8cc104dacc5ada63d1a276461b..d94fb6fba36ae33791978996f93bde46aa740cd4 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/computation/cpre.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/computation/cpre.ma
@@ -24,11 +24,11 @@ definition cpre: relation4 genv lenv term term ≝
 interpretation "evaluation for context-sensitive parallel reduction (term)"
    'PRedEval G L T1 T2 = (cpre G L T1 T2).
 
-(* Basic_properties *********************************************************)
+(* Basic properties *********************************************************)
 
 (* Basic_1: was just: nf2_sn3 *)
-lemma csx_cpre: ∀h,g,G,L,T1. ⦃G, L⦄ ⊢ ⬊*[h, g] T1 → ∃T2. ⦃G, L⦄ ⊢ T1 ➡* 𝐍⦃T2⦄.
-#h #g #G #L #T1 #H @(csx_ind … H) -T1
+lemma csx_cpre: ∀h,o,G,L,T1. ⦃G, L⦄ ⊢ ⬊*[h, o] T1 → ∃T2. ⦃G, L⦄ ⊢ T1 ➡* 𝐍⦃T2⦄.
+#h #o #G #L #T1 #H @(csx_ind … H) -T1
 #T1 #_ #IHT1 elim (cnr_dec G L T1) /3 width=3 by ex_intro, conj/
 * #T #H1T1 #H2T1 elim (IHT1 … H2T1) -IHT1 -H2T1 /2 width=2 by cpr_cpx/
 #T2 * /4 width=3 by cprs_strap2, ex_intro, conj/