X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fdama%2Fdama%2Fproperty_sigma.ma;h=74f03de4c9fe2ee552a207c79b15c5413fe85962;hb=62571dd402d272b1632b7739607d25df3552cc04;hp=67209928116df8aec54e7a70e5304a0011d257e1;hpb=ada8695ba51b2ecbd4a955f990e8d06f038aac6b;p=helm.git

diff --git a/helm/software/matita/contribs/dama/dama/property_sigma.ma b/helm/software/matita/contribs/dama/dama/property_sigma.ma
index 672099281..74f03de4c 100644
--- a/helm/software/matita/contribs/dama/dama/property_sigma.ma
+++ b/helm/software/matita/contribs/dama/dama/property_sigma.ma
@@ -20,7 +20,7 @@ alias num (instance 0) = "natural number".
 definition property_sigma ≝
   λC:ordered_uniform_space.
    ∀U.us_unifbase ? U → 
-     ∃V:sequence (C square → Prop).
+     ∃V:sequence (C squareB → Prop).
        (∀i.us_unifbase ? (V i)) ∧ 
        ∀a:sequence C.∀x:C.(a ↑ x ∨ a ↓ x) → 
          (∀n.∀i,j.n ≤ i → n ≤ j → V n 〈a i,a j〉) → U 〈a 0,x〉.
@@ -57,13 +57,12 @@ qed.
 lemma max_le_r: ∀n,m,z.max n m ≤ z → m ≤ z.
 intros; rewrite > sym_max in H; apply (max_le_l ??? H); 
 qed.
-    
+  
 (* Lemma 3.6 *)   
 lemma sigma_cauchy:
   ∀C:ordered_uniform_space.property_sigma C →
     ∀a:sequence C.∀l:C.(a ↑ l ∨ a ↓ l) → a is_cauchy → a uniform_converges l.
 intros 8; cases (H ? H3) (w H5); cases H5 (H8 H9); clear H5;
-alias symbol "pair" = "pair".
 letin spec ≝ (λz,k:nat.∀i,j,l:nat.k ≤ i → k ≤ j → l ≤ z → w l 〈a i,a j〉);
 letin m ≝ (hide ? (let rec aux (i:nat) : nat ≝
   match i with
@@ -92,26 +91,31 @@ cut ((⌊x,(m x:nat)⌋ : sequence nat_ordered_set) is_increasing) as Hm1; [2:
 clearbody m; unfold spec in m Hm Hm1; clear spec;
 cut (⌊x,a (m x)⌋ ↑ l ∨ ⌊x,a (m x)⌋ ↓ l) as H10; [2: 
  cases H1;
- [ left; apply (selection_uparrow ?? Hm a l H4);
- | right; apply (selection_downarrow ?? Hm a l H4);]] 
+ [ left; apply (selection_uparrow ? Hm a l H4);
+ | right; apply (selection_downarrow ? Hm a l H4);]] 
 lapply (H9 ?? H10) as H11; [
   exists [apply (m 0:nat)] intros;
-  cases H1;
-    [cases H5; cases H7; apply (ous_convex ?? H3 ? H11 (H12 (m O)));
-    |cases H5; cases H7; cases (us_phi4 ?? H3 〈(a (m O)),l〉); 
-     lapply (H14 H11) as H11'; apply (ous_convex ?? H3 〈l,(a (m O))〉 H11' (H12 (m O)));]
-  simplify; repeat split; [1,6:intro X; cases (os_coreflexive ?? X)|*: try apply H12;]
-  [1:change with (a (m O) ≤ a i);
-     apply (trans_increasing ?? H6); intro; apply (le_to_not_lt ?? H4 H14);
-  |2:change with (a i ≤ a (m O));
-     apply (trans_decreasing ?? H6); intro; apply (le_to_not_lt ?? H4 H16);]]  
+  cases H1; cases H5; cases H7; cases (us_phi4 ?? H3 〈l,a i〉);
+  apply H15; change with (U 〈a i,l〉);
+    [apply (ous_convex_l C ? H3 ? H11 (H12 (m O)));
+    |apply (ous_convex_r C ? H3 ? H11 (H12 (m O)));]
+  [1:apply (H12 i);
+  |3: apply (le_reflexive l);
+  |4: apply (H12 i);
+  |2:change with (a (m O) ≤ a i);
+     apply (trans_increasing a H6 (\fst (m 0)) i); intro; apply (le_to_not_lt ?? H4 H16);
+  |5:apply (H12 i);
+  |7:apply (ge_reflexive (l : hos_carr (os_r C)));
+  |8:apply (H12 i);
+  |6:change with (a i ≤ a (m O));
+     apply (trans_decreasing ? H6 (\fst (m 0)) i); intro; apply (le_to_not_lt ?? H4 H16);]]  
 clear H10; intros (p q r); change with (w p 〈a (m q),a (m r)〉);
 generalize in match (refl_eq nat (m p)); 
 generalize in match (m p) in ⊢ (? ? ? % → %); intro X; cases X (w1 H15); clear X; 
 intros (H16); simplify in H16:(? ? ? %); destruct H16;
 apply H15; [3: apply le_n]
-[1: lapply (trans_increasing ?? Hm1 p q) as T; [apply not_lt_to_le; apply T;]
+[1: lapply (trans_increasing ? Hm1 p q) as T; [apply not_lt_to_le; apply T;]
     apply (le_to_not_lt p q H4);
-|2: lapply (trans_increasing ?? Hm1 p r) as T; [apply not_lt_to_le; apply T;]
+|2: lapply (trans_increasing ? Hm1 p r) as T; [apply not_lt_to_le; apply T;]
     apply (le_to_not_lt p r H5);]
 qed.