1 (**************************************************************************)
4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
13 (**************************************************************************)
15 include "formal_topology/basic_topologies.ma".
16 include "formal_topology/o-basic_topologies.ma".
17 include "formal_topology/relations_to_o-algebra.ma".
19 definition o_basic_topology_of_basic_topology: basic_topology → Obasic_topology.
20 intros (b); constructor 1;
21 [ apply (POW' b) | apply (A b) | apply (J b);
22 | apply (A_is_saturation b) | apply (J_is_reduction b) | apply (compatibility b) ]
25 definition o_continuous_relation_of_continuous_relation:
26 ∀BT1,BT2.continuous_relation BT1 BT2 →
27 Ocontinuous_relation (o_basic_topology_of_basic_topology BT1) (o_basic_topology_of_basic_topology BT2).
28 intros (BT1 BT2 c); constructor 1;
29 [ apply (orelation_of_relation ?? c) | apply (reduced ?? c) | apply (saturated ?? c) ]
34 lemma o_continuous_relation_of_continuous_relation_morphism :
35 ∀S,T:category2_of_category1 BTop.
36 unary_morphism2 (arrows2 (category2_of_category1 BTop) S T)
37 (arrows2 OBTop (o_basic_topology_of_basic_topology S) (o_basic_topology_of_basic_topology T)).
40 [ apply (o_continuous_relation_of_continuous_relation S T);
41 | cases daemon (*apply (o_relation_pair_of_relation_pair_is_morphism S T)*)]
44 definition BTop_to_OBTop: carr3 ((category2_of_category1 BTop) ⇒_\c3 OBTop).
46 [ apply o_basic_topology_of_basic_topology;
47 | intros; apply o_continuous_relation_of_continuous_relation_morphism;
48 | cases daemon (*apply o_relation_topology_of_relation_topology_morphism_respects_id*);
49 | cases daemon (*apply o_relation_topology_of_relation_topology_morphism_respects_comp*);]
53 alias symbol "eq" (instance 2) = "setoid1 eq".
54 alias symbol "eq" (instance 1) = "setoid2 eq".
55 theorem BTop_to_OBTop_faithful: faithful2 ?? BTop_to_OBTop.
57 whd in e; unfold BTop_to_OBTop in e; simplify in e;
58 change in match (oA ?) in e with (A o1);
60 alias symbol "OR_f_minus_star" (instance 1) = "relation f⎻*".
61 change in match ((o_continuous_relation_of_continuous_relation_morphism o1 o2 f)⎻* ) in e with ((foo ?? f)⎻* );
62 change in match ((o_continuous_relation_of_continuous_relation_morphism o1 o2 g)⎻* ) in e with ((foo ?? g)⎻* );
65 alias symbol "OR_f_minus" (instance 1) = "relation f⎻".
66 letin fb ≝ ((ext ?? f) b);
68 whd in Hletin:(? ? ? % %);
69 cases (Hletin); simplify in s s1;
72 lapply depth=0 (s b); intro; apply (Hletin1 ? a ?)
74 change in Hletin with ((foo ?? f)⎻*
76 alias symbol "OR_f_minus_star" (instance 4) = "relation f⎻*".
77 alias symbol "OR_f_minus_star" (instance 4) = "relation f⎻*".
79 (comp2 SET1 (Ω^o1) (Ω^o1) (Ω^o2) (A o1) (foo o1 o2 f)⎻* =_1
80 comp2 SET1 (Ω^o1) (Ω^o1) (Ω^o2) (A o1) (foo o1 o2 g)⎻*
85 change in e with (comp1 SET (Ω^o1) ?? (A o1) (foo o1 o2 f)⎻* = ((foo o1 o2 g)⎻* ∘ A o1));
86 unfold o_continuous_relation_of_continuous_relation_morphism in e;
87 unfold o_continuous_relation_of_continuous_relation in e;
91 include "formal_topology/notation.ma".
93 theorem BTop_to_OBTop_full:
94 ∀S,T.∀f. exT22 ? (λg. map_arrows2 ?? BTop_to_OBTop S T g = f).
96 cases (POW_full (carrbt S) (carrbt T) (Ocont_rel ?? f)) (g Hg);
100 | apply hide; intros; lapply (Oreduced ?? f ? e);
101 cases Hg; lapply (e3 U) as K; apply (.= K);
102 apply (.= Hletin); apply rule (†(K^-1));
103 | apply hide; intros; lapply (Osaturated ?? f ? e);
104 cases Hg; lapply (e1 U) as K; apply (.= K);
105 apply (.= Hletin); apply rule (†(K^-1));
107 | simplify; unfold BTop_to_OBTop; simplify;
108 unfold o_continuous_relation_of_continuous_relation_morphism; simplify;
109 cases Hg; whd; simplify; intro;