X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fdama%2Fdama%2Flebesgue.ma;h=e1fbd0a5a75cac9f840d207833e3319214680224;hb=c38cc6760eae55641605ac56579340e3e54a44b5;hp=46fe6e4223afa0136c19bed8423339b88308758c;hpb=99f153e43f18bc682339bed41c8230af2ac6fd2f;p=helm.git

diff --git a/helm/software/matita/contribs/dama/dama/lebesgue.ma b/helm/software/matita/contribs/dama/dama/lebesgue.ma
index 46fe6e422..e1fbd0a5a 100644
--- a/helm/software/matita/contribs/dama/dama/lebesgue.ma
+++ b/helm/software/matita/contribs/dama/dama/lebesgue.ma
@@ -20,18 +20,19 @@ lemma order_converges_bigger_lowsegment:
   ∀C:ordered_set.
    ∀a:sequence C.∀l,u:C.∀H:∀i:nat.a i ∈ [l,u]. 
      ∀x:C.∀p:a order_converges x. 
-       ∀j.l ≤ (fst p) j.
-intros; cases p; clear p; simplify; cases H1; clear H1; cases H2; clear H2;
-cases (H3 j); clear H3; cases H2; cases H7; clear H2 H7;
-intro H2; cases (H8 ? H2);
-cases (H (w1+j)); apply (H12 H7);
+       ∀j.l ≤ (pi1exT23 ???? p) j.
+intros; cases p (xi yi Ux Dy Hxy); clear p; simplify; 
+cases Ux (Ixi Sxi); clear Ux; cases Dy (Dyi Iyi); clear Dy;
+cases (Hxy j) (Ia Sa); clear Hxy; cases Ia (Da SSa); cases Sa (Inca SIa); clear Ia Sa;
+intro H2; cases (SSa ? H2) (w Hw); simplify in Hw;
+cases (H (w+j)) (Hal Hau); apply (Hau Hw);
 qed.   
 
 lemma order_converges_smaller_upsegment:
   ∀C:ordered_set.
    ∀a:sequence C.∀l,u:C.∀H:∀i:nat.a i ∈ [l,u]. 
      ∀x:C.∀p:a order_converges x. 
-       ∀j.(snd p) j ≤ u.
+       ∀j.(pi2exT23 ???? p) j ≤ u.
 intros; cases p; clear p; simplify; cases H1; clear H1; cases H2; clear H2;
 cases (H3 j); clear H3; cases H2; cases H7; clear H2 H7;
 intro H2; cases (H10 ? H2);
@@ -45,12 +46,8 @@ theorem lebesgue_oc:
     ∀a:sequence C.∀l,u:C.∀H:∀i:nat.a i ∈ [l,u]. 
      ∀x:C.a order_converges x → 
       x ∈ [l,u] ∧ 
-      ∀h:x ∈ [l,u]. (* manca il pullback? *)
-       uniform_converge 
-        (uniform_space_OF_ordered_uniform_space 
-         (segment_ordered_uniform_space C l u))
-        (λn.sig_in C (λx.x∈[l,u]) (a n) (H n))    
-        (sig_in ?? x h).
+      ∀h:x ∈ [l,u].
+       uniform_converge {[l,u]} (⌊n,≪a n,H n≫⌋) ≪x,h≫.
 intros;
 generalize in match (order_converges_bigger_lowsegment ???? H1 ? H2);
 generalize in match (order_converges_smaller_upsegment ???? H1 ? H2);
@@ -68,18 +65,17 @@ split;
     [1: apply (le_transitive ???? (H8 0)); cases (Hyi 0); assumption
     |2: apply (le_transitive ????? (H4 0)); cases (Hxi 0); assumption]
 |2: intros 3 (h);
-    letin X ≝ (sig_in ?? x h);
-    letin Xi ≝ (λn.sig_in ?? (xi n) (Hxi n));
-    letin Yi ≝ (λn.sig_in ?? (yi n) (Hyi n));
-    letin Ai ≝ (λn:nat.sig_in ?? (a n) (H1 n));
-    apply (sandwich {[l,u]} X Xi Yi Ai); try assumption;
+    letin Xi ≝ (⌊n,≪xi n,Hxi n≫⌋);
+    letin Yi ≝ (⌊n,≪yi n,Hyi n≫⌋);
+    letin Ai ≝ (⌊n,≪a n,H1 n≫⌋);
+    apply (sandwich {[l,u]} ≪?,h≫ Xi Yi Ai); try assumption;
     [1: intro j; cases (Hxy j); cases H3; cases H4; split;
         [apply (H5 0);|apply (H7 0)]
-    |2: cases (H l u Xi X) (Ux Uy); apply Ux; cases Hx; split; [apply H3;]
-        cases H4; split; [apply H5] intros (y Hy);cases (H6 (fst y));[2:apply Hy];
+    |2: cases (H l u Xi ≪?,h≫) (Ux Uy); apply Ux; cases Hx; split; [apply H3;]
+        cases H4; split; [apply H5] intros (y Hy);cases (H6 (\fst y));[2:apply Hy];
         exists [apply w] apply H7; 
-    |3: cases (H l u Yi X) (Ux Uy); apply Uy; cases Hy; split; [apply H3;]
-        cases H4; split; [apply H5] intros (y Hy);cases (H6 (fst y));[2:apply Hy];
+    |3: cases (H l u Yi ≪?,h≫) (Ux Uy); apply Uy; cases Hy; split; [apply H3;]
+        cases H4; split; [apply H5] intros (y Hy);cases (H6 (\fst y));[2:apply Hy];
         exists [apply w] apply H7;]]
 qed.
  
@@ -91,12 +87,8 @@ theorem lebesgue_se:
     ∀a:sequence C.∀l,u:C.∀H:∀i:nat.a i ∈ [l,u]. 
      ∀x:C.a order_converges x → 
       x ∈ [l,u] ∧ 
-      ∀h:x ∈ [l,u]. (* manca il pullback? *)
-       uniform_converge 
-        (uniform_space_OF_ordered_uniform_space 
-         (segment_ordered_uniform_space C l u))
-        (λn.sig_in C (λx.x∈[l,u]) (a n) (H n))    
-        (sig_in ?? x h). 
+      ∀h:x ∈ [l,u].
+       uniform_converge {[l,u]} (⌊n,≪a n,H n≫⌋) ≪x,h≫.
 intros (C S);
 generalize in match (order_converges_bigger_lowsegment ???? H1 ? H2);
 generalize in match (order_converges_smaller_upsegment ???? H1 ? H2);
@@ -116,11 +108,10 @@ split;
 |2: intros 3;
     lapply (uparrow_upperlocated ? xi x Hx)as Ux;
     lapply (downarrow_lowerlocated ? yi x Hy)as Uy;
-    letin X ≝ (sig_in ?? x h);
-    letin Xi ≝ (λn.sig_in ?? (xi n) (Hxi n));
-    letin Yi ≝ (λn.sig_in ?? (yi n) (Hyi n));
-    letin Ai ≝ (λn:nat.sig_in ?? (a n) (H1 n));
-    apply (sandwich {[l,u]} X Xi Yi Ai); try assumption;
+    letin Xi ≝ (⌊n,≪xi n,Hxi n≫⌋);
+    letin Yi ≝ (⌊n,≪yi n,Hyi n≫⌋);
+    letin Ai ≝ (⌊n,≪a n,H1 n≫⌋);
+    apply (sandwich {[l,u]} ≪x,h≫ Xi Yi Ai); try assumption;
     [1: intro j; cases (Hxy j); cases H3; cases H4; split;
         [apply (H5 0);|apply (H7 0)]
     |2: cases (restrict_uniform_convergence_uparrow ? S ?? (H l u) Xi x Hx);