X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fcomputation%2Fscpds_scpds.ma;h=e9afcf4efe2f8fabacbe05235e386fd93bdbf5e2;hb=c60524dec7ace912c416a90d6b926bee8553250b;hp=a7213b0d250185c0e24a8b1337bffe64907ea601;hpb=f10cfe417b6b8ec1c7ac85c6ecf5fb1b3fdf37db;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/computation/scpds_scpds.ma b/matita/matita/contribs/lambdadelta/basic_2/computation/scpds_scpds.ma
index a7213b0d2..e9afcf4ef 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/computation/scpds_scpds.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/computation/scpds_scpds.ma
@@ -21,48 +21,48 @@ include "basic_2/computation/scpds.ma".
 
 (* Advanced properties ******************************************************)
 
-lemma scpds_strap2: ∀h,g,G,L,T1,T,T2,l1,l. ⦃G, L⦄ ⊢ T1 ▪[h, g] l1+1 →
-                    ⦃G, L⦄ ⊢ T1 •*[h, 1] T → ⦃G, L⦄ ⊢ T •*➡*[h, g, l] T2 →
-                    ⦃G, L⦄ ⊢ T1 •*➡*[h, g, l+1] T2.
-#h #g #G #L #T1 #T #T2 #l1 #l #Hl1 #HT1 *
-#T0 #l0 #Hl0 #HTl0 #HT0 #HT02
-lapply (lstas_da_conf … HT1 … Hl1) <minus_plus_m_m #HTl1
-lapply (da_mono … HTl0 … HTl1) -HTl0 -HTl1 #H destruct
+lemma scpds_strap2: ∀h,g,G,L,T1,T,T2,d1,d. ⦃G, L⦄ ⊢ T1 ▪[h, g] d1+1 →
+                    ⦃G, L⦄ ⊢ T1 •*[h, 1] T → ⦃G, L⦄ ⊢ T •*➡*[h, g, d] T2 →
+                    ⦃G, L⦄ ⊢ T1 •*➡*[h, g, d+1] T2.
+#h #g #G #L #T1 #T #T2 #d1 #d #Hd1 #HT1 *
+#T0 #d0 #Hd0 #HTd0 #HT0 #HT02
+lapply (lstas_da_conf … HT1 … Hd1) <minus_plus_m_m #HTd1
+lapply (da_mono … HTd0 … HTd1) -HTd0 -HTd1 #H destruct
 lapply (lstas_trans … HT1 … HT0) -T >commutative_plus
 /3 width=6 by le_S_S, ex4_2_intro/
 qed.
 
-lemma scpds_cprs_trans: ∀h,g,G,L,T1,T,T2,l.
-                        ⦃G, L⦄ ⊢ T1 •*➡*[h, g, l] T → ⦃G, L⦄ ⊢ T ➡* T2 → ⦃G, L⦄ ⊢ T1 •*➡*[h, g, l] T2.
-#h #g #G #L #T1 #T #T2 #l * /3 width=8 by cprs_trans, ex4_2_intro/
+lemma scpds_cprs_trans: ∀h,g,G,L,T1,T,T2,d.
+                        ⦃G, L⦄ ⊢ T1 •*➡*[h, g, d] T → ⦃G, L⦄ ⊢ T ➡* T2 → ⦃G, L⦄ ⊢ T1 •*➡*[h, g, d] T2.
+#h #g #G #L #T1 #T #T2 #d * /3 width=8 by cprs_trans, ex4_2_intro/
 qed-.
 
-lemma lstas_scpds_trans: ∀h,g,G,L,T1,T,T2,l1,l2,l.
-                         l2 ≤ l1 → ⦃G, L⦄ ⊢ T1 ▪[h, g] l1 →
-                         ⦃G, L⦄ ⊢ T1 •*[h, l2] T → ⦃G, L⦄ ⊢ T •*➡*[h, g, l] T2 → ⦃G, L⦄ ⊢ T1 •*➡*[h, g, l2+l] T2.
-#h #g #G #L #T1 #T #T2 #l1 #l2 #l #Hl21 #HTl1 #HT1 * #T0 #l0 #Hl0 #HTl0 #HT0 #HT02
-lapply (lstas_da_conf … HT1 … HTl1) #HTl12
-lapply (da_mono … HTl12 … HTl0) -HTl12 -HTl0 #H destruct
-lapply (le_minus_to_plus_r … Hl21 Hl0) -Hl21 -Hl0
+lemma lstas_scpds_trans: ∀h,g,G,L,T1,T,T2,d1,d2,d.
+                         d2 ≤ d1 → ⦃G, L⦄ ⊢ T1 ▪[h, g] d1 →
+                         ⦃G, L⦄ ⊢ T1 •*[h, d2] T → ⦃G, L⦄ ⊢ T •*➡*[h, g, d] T2 → ⦃G, L⦄ ⊢ T1 •*➡*[h, g, d2+d] T2.
+#h #g #G #L #T1 #T #T2 #d1 #d2 #d #Hd21 #HTd1 #HT1 * #T0 #d0 #Hd0 #HTd0 #HT0 #HT02
+lapply (lstas_da_conf … HT1 … HTd1) #HTd12
+lapply (da_mono … HTd12 … HTd0) -HTd12 -HTd0 #H destruct
+lapply (le_minus_to_plus_r … Hd21 Hd0) -Hd21 -Hd0
 /3 width=7 by lstas_trans, ex4_2_intro/
 qed-.
 
 (* Advanced inversion lemmas ************************************************)
 
-lemma scpds_inv_abst1: ∀h,g,a,G,L,V1,T1,U2,l. ⦃G, L⦄ ⊢ ⓛ{a}V1.T1 •*➡*[h, g, l] U2 →
-                       ∃∃V2,T2. ⦃G, L⦄ ⊢ V1 ➡* V2 & ⦃G, L.ⓛV1⦄ ⊢ T1 •*➡*[h, g, l] T2 &
+lemma scpds_inv_abst1: ∀h,g,a,G,L,V1,T1,U2,d. ⦃G, L⦄ ⊢ ⓛ{a}V1.T1 •*➡*[h, g, d] U2 →
+                       ∃∃V2,T2. ⦃G, L⦄ ⊢ V1 ➡* V2 & ⦃G, L.ⓛV1⦄ ⊢ T1 •*➡*[h, g, d] T2 &
                                 U2 = ⓛ{a}V2.T2.
-#h #g #a #G #L #V1 #T1 #U2 #l2 * #X #l1 #Hl21 #Hl1 #H1 #H2
-lapply (da_inv_bind … Hl1) -Hl1 #Hl1
+#h #g #a #G #L #V1 #T1 #U2 #d2 * #X #d1 #Hd21 #Hd1 #H1 #H2
+lapply (da_inv_bind … Hd1) -Hd1 #Hd1
 elim (lstas_inv_bind1 … H1) -H1 #U #HTU1 #H destruct
 elim (cprs_inv_abst1 … H2) -H2 #V2 #T2 #HV12 #HUT2 #H destruct
 /3 width=6 by ex4_2_intro, ex3_2_intro/
 qed-.
 
-lemma scpds_inv_abbr_abst: ∀h,g,a1,a2,G,L,V1,W2,T1,T2,l. ⦃G, L⦄ ⊢ ⓓ{a1}V1.T1 •*➡*[h, g, l] ⓛ{a2}W2.T2 →
-                           ∃∃T. ⦃G, L.ⓓV1⦄ ⊢ T1 •*➡*[h, g, l] T & ⬆[0, 1] ⓛ{a2}W2.T2 ≡ T & a1 = true.
-#h #g #a1 #a2 #G #L #V1 #W2 #T1 #T2 #l2 * #X #l1 #Hl21 #Hl1 #H1 #H2
-lapply (da_inv_bind … Hl1) -Hl1 #Hl1
+lemma scpds_inv_abbr_abst: ∀h,g,a1,a2,G,L,V1,W2,T1,T2,d. ⦃G, L⦄ ⊢ ⓓ{a1}V1.T1 •*➡*[h, g, d] ⓛ{a2}W2.T2 →
+                           ∃∃T. ⦃G, L.ⓓV1⦄ ⊢ T1 •*➡*[h, g, d] T & ⬆[0, 1] ⓛ{a2}W2.T2 ≡ T & a1 = true.
+#h #g #a1 #a2 #G #L #V1 #W2 #T1 #T2 #d2 * #X #d1 #Hd21 #Hd1 #H1 #H2
+lapply (da_inv_bind … Hd1) -Hd1 #Hd1
 elim (lstas_inv_bind1 … H1) -H1 #U1 #HTU1 #H destruct
 elim (cprs_inv_abbr1 … H2) -H2 *
 [ #V2 #U2 #HV12 #HU12 #H destruct
@@ -70,24 +70,24 @@ elim (cprs_inv_abbr1 … H2) -H2 *
 ]
 qed-.
 
-lemma scpds_inv_lstas_eq: ∀h,g,G,L,T1,T2,l. ⦃G, L⦄ ⊢ T1 •*➡*[h, g, l] T2 →
-                          ∀T. ⦃G, L⦄ ⊢ T1 •*[h, l] T → ⦃G, L⦄ ⊢ T ➡* T2.
-#h #g #G #L #T1 #T2 #l2 *
-#T0 #l1 #_ #_ #HT10 #HT02 #T #HT1
+lemma scpds_inv_lstas_eq: ∀h,g,G,L,T1,T2,d. ⦃G, L⦄ ⊢ T1 •*➡*[h, g, d] T2 →
+                          ∀T. ⦃G, L⦄ ⊢ T1 •*[h, d] T → ⦃G, L⦄ ⊢ T ➡* T2.
+#h #g #G #L #T1 #T2 #d2 *
+#T0 #d1 #_ #_ #HT10 #HT02 #T #HT1
 lapply (lstas_mono … HT10 … HT1) #H destruct //
 qed-.
 
 (* Advanced forward lemmas **************************************************)
 
-lemma scpds_fwd_cpxs: ∀h,g,G,L,T1,T2,l. ⦃G, L⦄ ⊢ T1 •*➡*[h, g, l] T2 → ⦃G, L⦄ ⊢ T1 ➡*[h, g] T2.
-#h #g #G #L #T1 #T2 #l * /3 width=5 by cpxs_trans, lstas_cpxs, cprs_cpxs/
+lemma scpds_fwd_cpxs: ∀h,g,G,L,T1,T2,d. ⦃G, L⦄ ⊢ T1 •*➡*[h, g, d] T2 → ⦃G, L⦄ ⊢ T1 ➡*[h, g] T2.
+#h #g #G #L #T1 #T2 #d * /3 width=5 by cpxs_trans, lstas_cpxs, cprs_cpxs/
 qed-.
 
 (* Main properties **********************************************************)
 
-theorem scpds_conf_eq: ∀h,g,G,L,T0,T1,l. ⦃G, L⦄ ⊢ T0 •*➡*[h, g, l] T1 →
-                       ∀T2. ⦃G, L⦄ ⊢ T0 •*➡*[h, g, l] T2 →
+theorem scpds_conf_eq: ∀h,g,G,L,T0,T1,d. ⦃G, L⦄ ⊢ T0 •*➡*[h, g, d] T1 →
+                       ∀T2. ⦃G, L⦄ ⊢ T0 •*➡*[h, g, d] T2 →
                        ∃∃T. ⦃G, L⦄ ⊢ T1 ➡* T & ⦃G, L⦄ ⊢ T2 ➡* T.
-#h #g #G #L #T0 #T1 #l0 * #U1 #l1 #_ #_ #H1 #HUT1 #T2 * #U2 #l2 #_ #_ #H2 #HUT2 -l1 -l2
-lapply (lstas_mono … H1 … H2) #H destruct -h -l0 /2 width=3 by cprs_conf/
+#h #g #G #L #T0 #T1 #d0 * #U1 #d1 #_ #_ #H1 #HUT1 #T2 * #U2 #d2 #_ #_ #H2 #HUT2 -d1 -d2
+lapply (lstas_mono … H1 … H2) #H destruct -h -d0 /2 width=3 by cprs_conf/
 qed-.