(**************************************************************************)
include "relations.ma".
+include "notation.ma".
record basic_pair: Type1 ≝
{ concr: REL;
rel: arrows1 ? concr form
}.
-notation "x ⊩ y" with precedence 45 for @{'Vdash2 $x $y}.
-notation "⊩" with precedence 60 for @{'Vdash}.
-
-interpretation "basic pair relation" 'Vdash2 x y = (rel _ x y).
-interpretation "basic pair relation (non applied)" 'Vdash = (rel _).
+interpretation "basic pair relation" 'Vdash2 x y c = (fun21 ___ (rel c) x y).
+interpretation "basic pair relation (non applied)" 'Vdash c = (rel c).
alias symbol "eq" = "setoid1 eq".
alias symbol "compose" = "category1 composition".
commute: ⊩ ∘ concr_rel = form_rel ∘ ⊩
}.
-notation "hvbox (r \sub \c)" with precedence 90 for @{'concr_rel $r}.
-notation "hvbox (r \sub \f)" with precedence 90 for @{'form_rel $r}.
interpretation "concrete relation" 'concr_rel r = (concr_rel __ r).
interpretation "formal relation" 'form_rel r = (form_rel __ r).
]
qed.
-lemma eq_to_eq': ∀o1,o2.∀r,r': relation_pair_setoid o1 o2. r=r' → r \sub\f ∘ ⊩ = r'\sub\f ∘ ⊩.
+definition relation_pair_of_relation_pair_setoid :
+ ∀P,Q. relation_pair_setoid P Q → relation_pair P Q ≝ λP,Q,x.x.
+coercion relation_pair_of_relation_pair_setoid.
+
+lemma eq_to_eq':
+ ∀o1,o2.∀r,r':relation_pair_setoid o1 o2. r=r' → r \sub\f ∘ ⊩ = r'\sub\f ∘ ⊩.
intros 7 (o1 o2 r r' H c1 f2);
split; intro H1;
[ lapply (fi ?? (commute ?? r c1 f2) H1) as H2;
apply ((id_neutral_left1 ????)‡#);]
qed.
+definition basic_pair_of_BP : objs1 BP → basic_pair ≝ λx.x.
+coercion basic_pair_of_BP.
+
+definition relation_pair_setoid_of_arrows1_BP :
+ ∀P,Q. arrows1 BP P Q → relation_pair_setoid P Q ≝ λP,Q,x.x.
+coercion relation_pair_setoid_of_arrows1_BP.
+
definition BPext: ∀o: BP. form o ⇒ Ω \sup (concr o).
intros; constructor 1;
[ apply (ext ? ? (rel o));
[ apply (λa,b: form o.{c | BPext o c ⊆ BPext o a ∩ BPext o b });
intros; simplify; apply (.= (†e)‡#); apply refl1
| intros; split; simplify; intros;
- [ apply (. #‡((†e)‡(†e1))); assumption
- | apply (. #‡((†e\sup -1)‡(†e1\sup -1))); assumption]]
+ [ apply (. #‡((†e^-1)‡(†e1^-1))); assumption
+ | apply (. #‡((†e)‡(†e1))); assumption]]
qed.
interpretation "fintersects" 'fintersects U V = (fun21 ___ (fintersects _) U V).
[ apply (λo: basic_pair.λa,b: Ω \sup (form o).{c | BPext o c ⊆ BPextS o a ∩ BPextS o b });
intros; simplify; apply (.= (†e)‡#); apply refl1
| intros; split; simplify; intros;
- [ apply (. #‡((†e)‡(†e1))); assumption
- | apply (. #‡((†e\sup -1)‡(†e1\sup -1))); assumption]]
+ [ apply (. #‡((†e^-1)‡(†e1^-1))); assumption
+ | apply (. #‡((†e)‡(†e1))); assumption]]
qed.
interpretation "fintersectsS" 'fintersects U V = (fun21 ___ (fintersectsS _) U V).
definition relS: ∀o: BP. binary_morphism1 (concr o) (Ω \sup (form o)) CPROP.
intros (o); constructor 1;
- [ apply (λx:concr o.λS: Ω \sup (form o).∃y:carr (form o).y ∈ S ∧ x ⊩ y);
+ [ apply (λx:concr o.λS: Ω \sup (form o).∃y:form o.y ∈ S ∧ x ⊩_o y);
| intros; split; intros; cases e2; exists [1,3: apply w]
- [ apply (. (#‡e1)‡(e‡#)); assumption
- | apply (. (#‡e1 \sup -1)‡(e \sup -1‡#)); assumption]]
+ [ apply (. (#‡e1^-1)‡(e^-1‡#)); assumption
+ | apply (. (#‡e1)‡(e‡#)); assumption]]
qed.
-interpretation "basic pair relation for subsets" 'Vdash2 x y = (fun21 (concr _) __ (relS _) x y).
-interpretation "basic pair relation for subsets (non applied)" 'Vdash = (fun21 ___ (relS _)).
+interpretation "basic pair relation for subsets" 'Vdash2 x y c = (fun21 (concr _) __ (relS c) x y).
+interpretation "basic pair relation for subsets (non applied)" 'Vdash c = (fun21 ___ (relS c)).