X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Flpxs_cpxs.ma;h=d820662f6349e0e3c487f7f28659803df886d342;hp=87f5bc330e8fbba84c24d4971ce2273c6e696f9c;hb=076439def28e649ec384fae038ed021dadd5f75c;hpb=d2545ffd201b1aa49887313791386add78fa8603

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/lpxs_cpxs.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/lpxs_cpxs.ma
index 87f5bc330..d820662f6 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/lpxs_cpxs.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/lpxs_cpxs.ma
@@ -19,16 +19,17 @@ include "basic_2/rt_computation/lpxs_lpx.ma".
 (* Properties with context-sensitive extended rt-computation for terms ******)
 
 (* Basic_2A1: was: cpxs_bind2 *)
-lemma cpxs_bind_dx (h) (G): ∀L,V1,V2. ❪G,L❫ ⊢ V1 ⬈*[h] V2 →
-                            ∀I,T1,T2. ❪G,L.ⓑ[I]V2❫ ⊢ T1 ⬈*[h] T2 →
-                            ∀p. ❪G,L❫ ⊢ ⓑ[p,I]V1.T1 ⬈*[h] ⓑ[p,I]V2.T2.
+lemma cpxs_bind_alt (h) (G):
+      ∀L,V1,V2. ❪G,L❫ ⊢ V1 ⬈*[h] V2 →
+      ∀I,T1,T2. ❪G,L.ⓑ[I]V2❫ ⊢ T1 ⬈*[h] T2 →
+      ∀p. ❪G,L❫ ⊢ ⓑ[p,I]V1.T1 ⬈*[h] ⓑ[p,I]V2.T2.
 /4 width=5 by lpxs_cpxs_trans, lpxs_pair, cpxs_bind/ qed.
 
 (* Inversion lemmas with context-sensitive ext rt-computation for terms *****)
 
-lemma cpxs_inv_abst1 (h) (G): ∀p,L,V1,T1,U2. ❪G,L❫ ⊢ ⓛ[p]V1.T1 ⬈*[h] U2 →
-                              ∃∃V2,T2. ❪G,L❫ ⊢ V1 ⬈*[h] V2 & ❪G,L.ⓛV1❫ ⊢ T1 ⬈*[h] T2 &
-                                       U2 = ⓛ[p]V2.T2.
+lemma cpxs_inv_abst1 (h) (G):
+      ∀p,L,V1,T1,U2. ❪G,L❫ ⊢ ⓛ[p]V1.T1 ⬈*[h] U2 →
+      ∃∃V2,T2. ❪G,L❫ ⊢ V1 ⬈*[h] V2 & ❪G,L.ⓛV1❫ ⊢ T1 ⬈*[h] T2 & U2 = ⓛ[p]V2.T2.
 #h #G #p #L #V1 #T1 #U2 #H @(cpxs_ind … H) -U2 /2 width=5 by ex3_2_intro/
 #U0 #U2 #_ #HU02 * #V0 #T0 #HV10 #HT10 #H destruct
 elim (cpx_inv_abst1 … HU02) -HU02 #V2 #T2 #HV02 #HT02 #H destruct
@@ -38,10 +39,9 @@ qed-.
 
 (* Basic_2A1: was: cpxs_inv_abbr1 *)
 lemma cpxs_inv_abbr1_dx (h) (p) (G) (L):
-                        ∀V1,T1,U2. ❪G,L❫ ⊢ ⓓ[p]V1.T1 ⬈*[h] U2 →
-                        ∨∨ ∃∃V2,T2. ❪G,L❫ ⊢ V1 ⬈*[h] V2 & ❪G,L.ⓓV1❫ ⊢ T1 ⬈*[h] T2 &
-                                    U2 = ⓓ[p]V2.T2
-                         | ∃∃T2. ❪G,L.ⓓV1❫ ⊢ T1 ⬈*[h] T2 & ⇧[1] U2 ≘ T2 & p = Ⓣ.
+      ∀V1,T1,U2. ❪G,L❫ ⊢ ⓓ[p]V1.T1 ⬈*[h] U2 →
+      ∨∨ ∃∃V2,T2. ❪G,L❫ ⊢ V1 ⬈*[h] V2 & ❪G,L.ⓓV1❫ ⊢ T1 ⬈*[h] T2 & U2 = ⓓ[p]V2.T2
+       | ∃∃T2. ❪G,L.ⓓV1❫ ⊢ T1 ⬈*[h] T2 & ⇧[1] U2 ≘ T2 & p = Ⓣ.
 #h #p #G #L #V1 #T1 #U2 #H
 @(cpxs_ind … H) -U2 /3 width=5 by ex3_2_intro, or_introl/
 #U0 #U2 #_ #HU02 * *