(* hints for ∩ *)
nlemma intersect_is_ext: ∀A. 𝛀^A → 𝛀^A → 𝛀^A.
#S A B; @ (A ∩ B); #x y Exy; @; *; #H1 H2; @;
-##[##1,2: napply (. Exy^-1â\80¡#); nassumption;
+##[##1,2: napply (. Exy^-1â\95ª_1#); nassumption;
##|##3,4: napply (. Exy‡#); nassumption]
nqed.
alias symbol "hint_decl" = "hint_decl_Type1".
unification hint 0 ≔ A : Type[0], B,C : Ω^A;
+ T ≟ powerclass_setoid A,
R ≟ mk_unary_morphism1 ??
(λS. mk_unary_morphism1 ?? (λS'.S ∩ S') (prop11 ?? (intersect_is_morph A S)))
(prop11 ?? (intersect_is_morph A))
(*------------------------------------------------------------------------*) ⊢
- fun11 ?? (fun11 ?? R B) C ≡ intersect A B C.
+ fun11 T T (fun11 T (unary_morphism1_setoid1 T T) R B) C ≡ intersect A B C.
interpretation "prop21 ext" 'prop2 l r =
(prop11 (ext_powerclass_setoid ?)
ext_carr A R ≡ union ? (ext_carr ? B) (ext_carr ? C).
unification hint 0 ≔ S:Type[0], A,B:Ω^S;
+ T ≟ powerclass_setoid S,
MM ≟ mk_unary_morphism1 ??
(λA.mk_unary_morphism1 ?? (λB.A ∪ B) (prop11 ?? (union_is_morph S A)))
(prop11 ?? (union_is_morph S))
(*--------------------------------------------------------------------------*) ⊢
- fun11 ?? (fun11 ?? MM A) B ≡ A ∪ B.
+ fun11 T T (fun11 T (unary_morphism1_setoid1 T T) MM A) B ≡ A ∪ B.
nlemma union_is_ext_morph:∀A.𝛀^A ⇒_1 𝛀^A ⇒_1 𝛀^A.
#A; napply (mk_binary_morphism1 … (union_is_ext …));
ext_carr A R ≡ substract ? (ext_carr ? B) (ext_carr ? C).
unification hint 0 ≔ S:Type[0], A,B:Ω^S;
+ T ≟ powerclass_setoid S,
MM ≟ mk_unary_morphism1 ??
(λA.mk_unary_morphism1 ?? (λB.A - B) (prop11 ?? (substract_is_morph S A)))
(prop11 ?? (substract_is_morph S))
(*--------------------------------------------------------------------------*) ⊢
- fun11 ?? (fun11 ?? MM A) B ≡ A - B.
+ fun11 T T (fun11 T (unary_morphism1_setoid1 T T) MM A) B ≡ A - B.
nlemma substract_is_ext_morph:∀A.𝛀^A ⇒_1 𝛀^A ⇒_1 𝛀^A.
#A; napply (mk_binary_morphism1 … (substract_is_ext …));
ext_carr A R ≡ singleton A a.
unification hint 0 ≔ A:setoid, a:A;
+ T ≟ setoid1_of_setoid A,
MM ≟ mk_unary_morphism1 ??
(λa:setoid1_of_setoid A.{(a)}) (prop11 ?? (single_is_morph A))
(*--------------------------------------------------------------------------*) ⊢
- fun11 ?? MM a ≡ {(a)}.
+ fun11 T (powerclass_setoid A) MM a ≡ {(a)}.
nlemma single_is_ext_morph:∀A:setoid.(setoid1_of_setoid A) ⇒_1 𝛀^A.
#A; @; ##[ #a; napply (single_is_ext ? a); ##] #a b E; @; #x; /3/; nqed.