X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fsubstitution%2Fcpys_alt.ma;h=929007118c8ec26e2eaee90a189f6fc3a7c3462d;hb=f7b7b9a4666ec1e50c64a20fb89bd2fc49f3870f;hp=045aa44901b8375c6a4c782b3e2b457cf7ce4723;hpb=32bdf7f107be22a121fab8225c5fae4eb6b33633;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_alt.ma b/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_alt.ma
index 045aa4490..929007118 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_alt.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_alt.ma
@@ -21,10 +21,10 @@ include "basic_2/substitution/cpys_lift.ma".
 inductive cpysa: ynat → ynat → relation4 genv lenv term term ≝
 | cpysa_atom : ∀I,G,L,d,e. cpysa d e G L (⓪{I}) (⓪{I})
 | cpysa_subst: ∀I,G,L,K,V1,V2,W2,i,d,e. d ≤ yinj i → i < d+e →
-               ⇩[0, i] L ≡ K.ⓑ{I}V1 → cpysa 0 (d+e-i-1) G K V1 V2 →
+               ⇩[0, i] L ≡ K.ⓑ{I}V1 → cpysa 0 (⫰(d+e-i)) G K V1 V2 →
                ⇧[0, i+1] V2 ≡ W2 → cpysa d e G L (#i) W2
 | cpysa_bind : ∀a,I,G,L,V1,V2,T1,T2,d,e.
-               cpysa d e G L V1 V2 → cpysa (d + 1) e G (L.ⓑ{I}V2) T1 T2 →
+               cpysa d e G L V1 V2 → cpysa (⫯d) e G (L.ⓑ{I}V2) T1 T2 →
                cpysa d e G L (ⓑ{a,I}V1.T1) (ⓑ{a,I}V2.T2)
 | cpysa_flat : ∀I,G,L,V1,V2,T1,T2,d,e.
                cpysa d e G L V1 V2 → cpysa d e G L T1 T2 →
@@ -86,12 +86,12 @@ qed-.
 lemma cpys_ind_alt: ∀R:ynat→ynat→relation4 genv lenv term term.
                     (∀I,G,L,d,e. R d e G L (⓪{I}) (⓪{I})) →
                     (∀I,G,L,K,V1,V2,W2,i,d,e. d ≤ yinj i → i < d + e →
-                     ⇩[O, i] L ≡ K.ⓑ{I}V1 → ⦃G, K⦄ ⊢ V1 ▶*×[O, d+e-i-1] V2 →
-                     ⇧[O, i + 1] V2 ≡ W2 → R O (d+e-i-1) G K V1 V2 → R d e G L (#i) W2
+                     ⇩[O, i] L ≡ K.ⓑ{I}V1 → ⦃G, K⦄ ⊢ V1 ▶*×[O, ⫰(d+e-i)] V2 →
+                     ⇧[O, i+1] V2 ≡ W2 → R O (⫰(d+e-i)) G K V1 V2 → R d e G L (#i) W2
                     ) →
                     (∀a,I,G,L,V1,V2,T1,T2,d,e. ⦃G, L⦄ ⊢ V1 ▶*×[d, e] V2 →
-                     ⦃G, L.ⓑ{I}V2⦄ ⊢ T1 ▶*×[d + 1, e] T2 → R d e G L V1 V2 →
-                     R (d+1) e G (L.ⓑ{I}V2) T1 T2 → R d e G L (ⓑ{a,I}V1.T1) (ⓑ{a,I}V2.T2)
+                     ⦃G, L.ⓑ{I}V2⦄ ⊢ T1 ▶*×[⫯d, e] T2 → R d e G L V1 V2 →
+                     R (⫯d) e G (L.ⓑ{I}V2) T1 T2 → R d e G L (ⓑ{a,I}V1.T1) (ⓑ{a,I}V2.T2)
                     ) →
                     (∀I,G,L,V1,V2,T1,T2,d,e. ⦃G, L⦄ ⊢ V1 ▶*×[d, e] V2 →
                      ⦃G, L⦄ ⊢ T1 ▶*×[d, e] T2 → R d e G L V1 V2 →