X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fformal_topology%2Foverlap%2Fo-algebra.ma;h=0a2e84880771c0a30b199f0198f7b55b4bff15b3;hb=3cf6181bded05eb63140d1b2ba4f2f5791a73b48;hp=41f9bfd0e0d1e5765f89e285696057b6a3048119;hpb=cb98bd7054893edee16aadd6741ec5210b04afbc;p=helm.git

diff --git a/helm/software/matita/contribs/formal_topology/overlap/o-algebra.ma b/helm/software/matita/contribs/formal_topology/overlap/o-algebra.ma
index 41f9bfd0e..0a2e84880 100644
--- a/helm/software/matita/contribs/formal_topology/overlap/o-algebra.ma
+++ b/helm/software/matita/contribs/formal_topology/overlap/o-algebra.ma
@@ -34,9 +34,9 @@ intros; cases x in e; cases y; simplify; intros; try apply refl1; whd in e; case
 qed.
 
 interpretation "unary morphism comprehension with no proof" 'comprehension T P = 
-  (mk_unary_morphism T _ P _).
+  (mk_unary_morphism T ? P ?).
 interpretation "unary morphism1 comprehension with no proof" 'comprehension T P = 
-  (mk_unary_morphism1 T _ P _).
+  (mk_unary_morphism1 T ? P ?).
 
 notation > "hvbox({ ident i ∈ s | term 19 p | by })" with precedence 90
 for @{ 'comprehension_by $s (λ${ident i}. $p) $by}.
@@ -44,52 +44,59 @@ notation < "hvbox({ ident i ∈ s | term 19 p })" with precedence 90
 for @{ 'comprehension_by $s (λ${ident i}:$_. $p) $by}.
 
 interpretation "unary morphism comprehension with proof" 'comprehension_by s \eta.f p = 
-  (mk_unary_morphism s _ f p).
+  (mk_unary_morphism s ? f p).
 interpretation "unary morphism1 comprehension with proof" 'comprehension_by s \eta.f p = 
-  (mk_unary_morphism1 s _ f p).
+  (mk_unary_morphism1 s ? f p).
 
 (* per il set-indexing vedere capitolo BPTools (foundational tools), Sect. 0.3.4 complete
    lattices, Definizione 0.9 *)
 (* USARE L'ESISTENZIALE DEBOLE *)
+
+
+notation > "A × B ⇉2,1 C" non associative with precedence 70 for @{binary_morphism1 $A $B $C}.
+notation > "A × B ⇉2,2 C" non associative with precedence 70 for @{binary_morphism2 $A $B $C}.
+notation > "B ⇉1,1 C" non associative with precedence 80 for @{arrows1 SET $B $C}.
+notation > "B ⇉1,2 C" non associative with precedence 80 for @{unary_morphism2 $B $C}.
+notation > "hvbox(a break ≤ b)" non associative with precedence 45 for @{oa_leq $a $b}.
+notation > "a >< b" non associative with precedence 45 for @{oa_overlap $a $b}.
+notation > "⋁ p" non associative with precedence 45 for @{oa_join ? $p}.
+notation > "⋀ p" non associative with precedence 45 for @{oa_meet ? $p}.
 record OAlgebra : Type2 := {
   oa_P :> SET1;
-  oa_leq : binary_morphism1 oa_P oa_P CPROP;
-  oa_overlap: binary_morphism1 oa_P oa_P CPROP;
-  oa_meet: ∀I:SET.unary_morphism2 (I ⇒ oa_P) oa_P;
-  oa_join: ∀I:SET.unary_morphism2 (I ⇒ oa_P) oa_P;
+  oa_leq : oa_P × oa_P ⇉2,1 CPROP;
+  oa_overlap: oa_P × oa_P ⇉2,1 CPROP;
+  oa_meet: ∀I:SET.(I ⇒ oa_P) ⇉1,2 oa_P;
+  oa_join: ∀I:SET.(I ⇒ oa_P) ⇉1,2 oa_P;
   oa_one: oa_P;
   oa_zero: oa_P;
-  oa_leq_refl: ∀a:oa_P. oa_leq a a; 
-  oa_leq_antisym: ∀a,b:oa_P.oa_leq a b → oa_leq b a → a = b;
-  oa_leq_trans: ∀a,b,c:oa_P.oa_leq a b → oa_leq b c → oa_leq a c;
-  oa_overlap_sym: ∀a,b:oa_P.oa_overlap a b → oa_overlap b a;
-  oa_meet_inf: 
-    ∀I:SET.∀p_i:I ⇒ oa_P.∀p:oa_P.
-      oa_leq p (oa_meet I p_i) = ∀i:I.oa_leq p (p_i i);
-  oa_join_sup: ∀I:SET.∀p_i:I ⇒ oa_P.∀p:oa_P.oa_leq (oa_join I p_i) p = ∀i:I.oa_leq (p_i i) p;
-  oa_zero_bot: ∀p:oa_P.oa_leq oa_zero p;
-  oa_one_top: ∀p:oa_P.oa_leq p oa_one;
+  oa_leq_refl: ∀a:oa_P. a ≤ a; 
+  oa_leq_antisym: ∀a,b:oa_P.a ≤ b → b ≤ a → a = b;
+  oa_leq_trans: ∀a,b,c:oa_P.a ≤ b → b ≤ c → a ≤ c;
+  oa_overlap_sym: ∀a,b:oa_P.a >< b → b >< a;
+  oa_meet_inf: ∀I:SET.∀p_i:I ⇒ oa_P.∀p:oa_P.p ≤ (⋀ p_i) = (∀i:I.p ≤ (p_i i));
+  oa_join_sup: ∀I:SET.∀p_i:I ⇒ oa_P.∀p:oa_P.(⋁ p_i) ≤ p = (∀i:I.p_i i ≤ p);
+  oa_zero_bot: ∀p:oa_P.oa_zero ≤ p;
+  oa_one_top: ∀p:oa_P.p ≤ oa_one;
   oa_overlap_preserves_meet_: 
-      ∀p,q:oa_P.oa_overlap p q → oa_overlap p 
-       (oa_meet ? { x ∈ BOOL | match x with [ true ⇒ p | false ⇒ q ] | IF_THEN_ELSE_p oa_P p q });
-  oa_join_split:
-      ∀I:SET.∀p.∀q:I ⇒ oa_P.
-       oa_overlap p (oa_join I q) = ∃i:I.oa_overlap p (q i);
+      ∀p,q:oa_P.p >< q → 
+        p >< (⋀ { x ∈ BOOL | match x with [ true ⇒ p | false ⇒ q ] | IF_THEN_ELSE_p oa_P p q });
+  oa_join_split: ∀I:SET.∀p.∀q:I ⇒ oa_P.p >< (⋁ q) = (∃i:I.p >< (q i));
   (*oa_base : setoid;
   1) enum non e' il nome giusto perche' non e' suriettiva
   2) manca (vedere altro capitolo) la "suriettivita'" come immagine di insiemi di oa_base
   oa_enum : ums oa_base oa_P;
   oa_density: ∀p,q.(∀i.oa_overlap p (oa_enum i) → oa_overlap q (oa_enum i)) → oa_leq p q
   *)
-  oa_density: 
-      ∀p,q.(∀r.oa_overlap p r → oa_overlap q r) → oa_leq p q
+  oa_density: ∀p,q.(∀r.p >< r → q >< r) → p ≤ q
 }.
 
-interpretation "o-algebra leq" 'leq a b = (fun21 ___ (oa_leq _) a b).
+notation "hvbox(a break ≤ b)" non associative with precedence 45 for @{ 'leq $a $b }.
+
+interpretation "o-algebra leq" 'leq a b = (fun21 ??? (oa_leq ?) a b).
 
 notation "hovbox(a mpadded width -150% (>)< b)" non associative with precedence 45
 for @{ 'overlap $a $b}.
-interpretation "o-algebra overlap" 'overlap a b = (fun21 ___ (oa_overlap _) a b).
+interpretation "o-algebra overlap" 'overlap a b = (fun21 ??? (oa_overlap ?) a b).
 
 notation < "hovbox(mstyle scriptlevel 1 scriptsizemultiplier 1.7 (∧) \below (\emsp) \nbsp term 90 p)" 
 non associative with precedence 50 for @{ 'oa_meet $p }.
@@ -99,9 +106,9 @@ non associative with precedence 50 for @{ 'oa_meet_mk (λ${ident i}:$I.$p) }.
 notation > "hovbox(∧ f)" non associative with precedence 60
 for @{ 'oa_meet $f }.
 interpretation "o-algebra meet" 'oa_meet f = 
-  (fun12 __ (oa_meet __) f).
+  (fun12 ?? (oa_meet ??) f).
 interpretation "o-algebra meet with explicit function" 'oa_meet_mk f = 
-  (fun12 __ (oa_meet __) (mk_unary_morphism _ _ f _)).
+  (fun12 ?? (oa_meet ??) (mk_unary_morphism ?? f ?)).
 
 notation < "hovbox(mstyle scriptlevel 1 scriptsizemultiplier 1.7 (∨) \below (\emsp) \nbsp term 90 p)" 
 non associative with precedence 50 for @{ 'oa_join $p }.
@@ -111,9 +118,9 @@ non associative with precedence 50 for @{ 'oa_join_mk (λ${ident i}:$I.$p) }.
 notation > "hovbox(∨ f)" non associative with precedence 60
 for @{ 'oa_join $f }.
 interpretation "o-algebra join" 'oa_join f = 
-  (fun12 __ (oa_join __) f).
+  (fun12 ?? (oa_join ??) f).
 interpretation "o-algebra join with explicit function" 'oa_join_mk f = 
-  (fun12 __ (oa_join __) (mk_unary_morphism _ _ f _)).
+  (fun12 ?? (oa_join ??) (mk_unary_morphism ?? f ?)).
 
 definition binary_meet : ∀O:OAlgebra. binary_morphism1 O O O.
 intros; split;
@@ -127,7 +134,7 @@ intros; split;
 qed.
 
 interpretation "o-algebra binary meet" 'and a b = 
-  (fun21 ___ (binary_meet _) a b).
+  (fun21 ??? (binary_meet ?) a b).
 
 prefer coercion Type1_OF_OAlgebra.
 
@@ -143,7 +150,7 @@ intros; split;
 qed.
 
 interpretation "o-algebra binary join" 'or a b = 
-  (fun21 ___ (binary_join _) a b).
+  (fun21 ??? (binary_join ?) a b).
 
 lemma oa_overlap_preservers_meet: ∀O:OAlgebra.∀p,q:O.p >< q → p >< (p ∧ q).
 (* next change to avoid universe inconsistency *)
@@ -166,9 +173,9 @@ notation > "hovbox(a ∨ b)" left associative with precedence 49
 for @{ 'oa_join (mk_unary_morphism BOOL ? (λx__:bool.match x__ with [ true ⇒ $a | false ⇒ $b ]) (IF_THEN_ELSE_p ? $a $b)) }.
 
 interpretation "o-algebra join" 'oa_join f = 
-  (fun12 __ (oa_join __) f).
+  (fun12 ?? (oa_join ??) f).
 interpretation "o-algebra join with explicit function" 'oa_join_mk f = 
-  (fun12 __ (oa_join __) (mk_unary_morphism _ _ f _)).
+  (fun12 ?? (oa_join ??) (mk_unary_morphism ?? f ?)).
 
 record ORelation (P,Q : OAlgebra) : Type2 ≝ {
   or_f_ : carr2 (P ⇒ Q);
@@ -187,10 +194,11 @@ constructor 1;
 | constructor 1;
    (* tenere solo una uguaglianza e usare la proposizione 9.9 per
       le altre (unicita' degli aggiunti e del simmetrico) *)
-   [ apply (λp,q. And42 (eq2 ? (or_f_minus_star_ ?? p) (or_f_minus_star_ ?? q)) 
-             (eq2 ? (or_f_minus_ ?? p) (or_f_minus_ ?? q)) 
-             (eq2 ? (or_f_ ?? p) (or_f_ ?? q)) 
-             (eq2 ? (or_f_star_ ?? p) (or_f_star_ ?? q))); 
+   [ apply (λp,q. And42 
+             (or_f_minus_star_ ?? p = or_f_minus_star_ ?? q) 
+             (or_f_minus_ ?? p = or_f_minus_ ?? q) 
+             (or_f_ ?? p = or_f_ ?? q) 
+             (or_f_star_ ?? p = or_f_star_ ?? q)); 
    | whd; simplify; intros; repeat split; intros; apply refl2;
    | whd; simplify; intros; cases a; clear a; split; 
      intro a; apply sym1; generalize in match a;assumption;
@@ -244,9 +252,9 @@ notation > "r⎻*" non associative with precedence 90 for @{'OR_f_minus_star $r}
 notation "r \sup ⎻" non associative with precedence 90 for @{'OR_f_minus $r}.
 notation > "r⎻" non associative with precedence 90 for @{'OR_f_minus $r}.
 
-interpretation "o-relation f⎻*" 'OR_f_minus_star r = (fun12 __ (or_f_minus_star _ _) r).
-interpretation "o-relation f⎻" 'OR_f_minus r = (fun12 __ (or_f_minus _ _) r).
-interpretation "o-relation f*" 'OR_f_star r = (fun12 __ (or_f_star _ _) r).
+interpretation "o-relation f⎻*" 'OR_f_minus_star r = (fun12 ?? (or_f_minus_star ? ?) r).
+interpretation "o-relation f⎻" 'OR_f_minus r = (fun12 ?? (or_f_minus ? ?) r).
+interpretation "o-relation f*" 'OR_f_star r = (fun12 ?? (or_f_star ? ?) r).
 
 definition or_prop1 : ∀P,Q:OAlgebra.∀F:ORelation_setoid P Q.∀p,q.
    (F p ≤ q) = (p ≤ F* q).
@@ -286,8 +294,7 @@ constructor 1;
     apply or_prop3;
   ]
 | intros; split; simplify; 
-   [3: unfold arrows1_of_ORelation_setoid;
-         apply ((†e)‡(†e1));
+   [3: unfold arrows1_of_ORelation_setoid; apply ((†e)‡(†e1));
    |1: apply ((†e)‡(†e1));
    |2,4: apply ((†e1)‡(†e));]]
 qed.
@@ -317,4 +324,128 @@ definition ORelation_setoid_of_arrows2_OA:
   ∀P,Q. arrows2 OA P Q → ORelation_setoid P Q ≝ λP,Q,c.c.
 coercion ORelation_setoid_of_arrows2_OA.
 
-prefer coercion Type_OF_objs2.
\ No newline at end of file
+prefer coercion Type_OF_objs2.
+
+(* alias symbol "eq" = "setoid1 eq". *)
+
+(* qui la notazione non va *)
+lemma leq_to_eq_join: ∀S:OA.∀p,q:S. p ≤ q → q = (binary_join ? p q).
+ intros;
+ apply oa_leq_antisym;
+  [ apply oa_density; intros;
+    apply oa_overlap_sym;
+    unfold binary_join; simplify;
+    apply (. (oa_join_split : ?));
+    exists; [ apply false ]
+    apply oa_overlap_sym;
+    assumption
+  | unfold binary_join; simplify;
+    apply (. (oa_join_sup : ?)); intro;
+    cases i; whd in ⊢ (? ? ? ? ? % ?);
+     [ assumption | apply oa_leq_refl ]]
+qed.
+
+lemma overlap_monotone_left: ∀S:OA.∀p,q,r:S. p ≤ q → p >< r → q >< r.
+ intros;
+ apply (. (leq_to_eq_join : ?)‡#);
+  [ apply f;
+  | skip
+  | apply oa_overlap_sym;
+    unfold binary_join; simplify;
+    apply (. (oa_join_split : ?));
+    exists [ apply true ]
+    apply oa_overlap_sym;
+    assumption; ]
+qed.
+
+(* Part of proposition 9.9 *)
+lemma f_minus_image_monotone: ∀S,T.∀R:arrows2 OA S T.∀p,q. p ≤ q → R⎻ p ≤ R⎻ q.
+ intros;
+ apply (. (or_prop2 : ?));
+ apply oa_leq_trans; [2: apply f; | skip | apply (. (or_prop2 : ?)^ -1); apply oa_leq_refl;]
+qed.
+ 
+(* Part of proposition 9.9 *)
+lemma f_minus_star_image_monotone: ∀S,T.∀R:arrows2 OA S T.∀p,q. p ≤ q → R⎻* p ≤ R⎻* q.
+ intros;
+ apply (. (or_prop2 : ?)^ -1);
+ apply oa_leq_trans; [3: apply f; | skip | apply (. (or_prop2 : ?)); apply oa_leq_refl;]
+qed.
+
+(* Part of proposition 9.9 *)
+lemma f_image_monotone: ∀S,T.∀R:arrows2 OA S T.∀p,q. p ≤ q → R p ≤ R q.
+ intros;
+ apply (. (or_prop1 : ?));
+ apply oa_leq_trans; [2: apply f; | skip | apply (. (or_prop1 : ?)^ -1); apply oa_leq_refl;]
+qed.
+
+(* Part of proposition 9.9 *)
+lemma f_star_image_monotone: ∀S,T.∀R:arrows2 OA S T.∀p,q. p ≤ q → R* p ≤ R* q.
+ intros;
+ apply (. (or_prop1 : ?)^ -1);
+ apply oa_leq_trans; [3: apply f; | skip | apply (. (or_prop1 : ?)); apply oa_leq_refl;]
+qed.
+
+lemma lemma_10_2_a: ∀S,T.∀R:arrows2 OA S T.∀p. p ≤ R⎻* (R⎻ p).
+ intros;
+ apply (. (or_prop2 : ?)^-1);
+ apply oa_leq_refl.
+qed.
+
+lemma lemma_10_2_b: ∀S,T.∀R:arrows2 OA S T.∀p. R⎻ (R⎻* p) ≤ p.
+ intros;
+ apply (. (or_prop2 : ?));
+ apply oa_leq_refl.
+qed.
+
+lemma lemma_10_2_c: ∀S,T.∀R:arrows2 OA S T.∀p. p ≤ R* (R p).
+ intros;
+ apply (. (or_prop1 : ?)^-1);
+ apply oa_leq_refl.
+qed.
+
+lemma lemma_10_2_d: ∀S,T.∀R:arrows2 OA S T.∀p. R (R* p) ≤ p.
+ intros;
+ apply (. (or_prop1 : ?));
+ apply oa_leq_refl.
+qed.
+
+lemma lemma_10_3_a: ∀S,T.∀R:arrows2 OA S T.∀p. R⎻ (R⎻* (R⎻ p)) = R⎻ p.
+ intros; apply oa_leq_antisym;
+  [ apply lemma_10_2_b;
+  | apply f_minus_image_monotone;
+    apply lemma_10_2_a; ]
+qed.
+
+lemma lemma_10_3_b: ∀S,T.∀R:arrows2 OA S T.∀p. R* (R (R* p)) = R* p.
+ intros; apply oa_leq_antisym;
+  [ apply f_star_image_monotone;
+    apply (lemma_10_2_d ?? R p);
+  | apply lemma_10_2_c; ]
+qed.
+
+lemma lemma_10_3_c: ∀S,T.∀R:arrows2 OA S T.∀p. R (R* (R p)) = R p.
+ intros; apply oa_leq_antisym;
+  [ apply lemma_10_2_d;
+  | apply f_image_monotone;
+    apply (lemma_10_2_c ?? R p); ]
+qed.
+
+lemma lemma_10_3_d: ∀S,T.∀R:arrows2 OA S T.∀p. R⎻* (R⎻ (R⎻* p)) = R⎻* p.
+ intros; apply oa_leq_antisym;
+  [ apply f_minus_star_image_monotone;
+    apply (lemma_10_2_b ?? R p);
+  | apply lemma_10_2_a; ]
+qed.
+
+lemma lemma_10_4_a: ∀S,T.∀R:arrows2 OA S T.∀p. R⎻* (R⎻ (R⎻* (R⎻ p))) = R⎻* (R⎻ p).
+ intros; apply (†(lemma_10_3_a ?? R p));
+qed.
+
+lemma lemma_10_4_b: ∀S,T.∀R:arrows2 OA S T.∀p. R (R* (R (R* p))) = R (R* p).
+intros; unfold in ⊢ (? ? ? % %); apply (†(lemma_10_3_b ?? R p));
+qed.
+
+lemma oa_overlap_sym': ∀o:OA.∀U,V:o. (U >< V) = (V >< U).
+ intros; split; intro; apply oa_overlap_sym; assumption.
+qed.
\ No newline at end of file