Rename stuff

This commit is contained in:
Frederik Hanghøj Iversen 2018-01-31 14:39:54 +01:00
parent 86d3d7368e
commit 92f0f8e0f0
3 changed files with 43 additions and 43 deletions

View file

@ -10,15 +10,8 @@ open import Data.Product renaming (proj₁ to fst ; proj₂ to snd)
open import Cat.Category
open import Cat.Functor
-- Tip from Andrea:
-- Use co-patterns - they help with showing more understandable types in goals.
lift-eq : {} {A B : Set } {a a' : A} {b b' : B} a a' b b' (a , b) (a' , b')
fst (lift-eq a b i) = a i
snd (lift-eq a b i) = b i
eqpair : {a b} {A : Set a} {B : Set b} {a a' : A} {b b' : B}
a a' b b' (a , b) (a' , b')
eqpair eqa eqb i = eqa i , eqb i
open import Cat.Equality
open Equality.Data.Product
open Functor
open IsFunctor
@ -27,23 +20,28 @@ open Category hiding (_∘_)
-- The category of categories
module _ ( ' : Level) where
private
module _ {A B C D : Category '} {f : Functor A B} {g : Functor B C} {h : Functor C D} where
module _ {𝔸 𝔹 𝔻 : Category '} {F : Functor 𝔸 𝔹} {G : Functor 𝔹 } {H : Functor 𝔻} where
private
eq* : func* (h ∘f (g ∘f f)) func* ((h ∘f g) ∘f f)
eq* : func* (H ∘f (G ∘f F)) func* ((H ∘f G) ∘f F)
eq* = refl
eq→ : PathP
(λ i {x y : A .Object} A .Arrow x y D .Arrow (eq* i x) (eq* i y))
(func→ (h ∘f (g ∘f f))) (func→ ((h ∘f g) ∘f f))
(λ i {A B : 𝔸 .Object} 𝔸 [ A , B ] 𝔻 [ eq* i A , eq* i B ])
(func→ (H ∘f (G ∘f F))) (func→ ((H ∘f G) ∘f F))
eq→ = refl
postulate eqI : PathP
(λ i {c : A .Object} eq→ i (A .𝟙 {c}) D .𝟙 {eq* i c})
((h ∘f (g ∘f f)) .isFunctor .ident)
(((h ∘f g) ∘f f) .isFunctor .ident)
postulate eqD : PathP (λ i { c c' c'' : A .Object} {a : A .Arrow c c'} {a' : A .Arrow c' c''}
eq→ i (A [ a' a ]) D [ eq→ i a' eq→ i a ])
((h ∘f (g ∘f f)) .isFunctor .distrib) (((h ∘f g) ∘f f) .isFunctor .distrib)
postulate
eqI
: (λ i {A : 𝔸 .Object} eq→ i (𝔸 .𝟙 {A}) 𝔻 .𝟙 {eq* i A})
[ (H ∘f (G ∘f F)) .isFunctor .ident
((H ∘f G) ∘f F) .isFunctor .ident
]
eqD
: (λ i {A B C} {f : 𝔸 [ A , B ]} {g : 𝔸 [ B , C ]}
eq→ i (𝔸 [ g f ]) 𝔻 [ eq→ i g eq→ i f ])
[ (H ∘f (G ∘f F)) .isFunctor .distrib
((H ∘f G) ∘f F) .isFunctor .distrib
]
assc : h ∘f (g ∘f f) (h ∘f g) ∘f f
assc : H ∘f (G ∘f F) (H ∘f G) ∘f F
assc = Functor≡ eq* eq→ (IsFunctor≡ eqI eqD)
module _ { 𝔻 : Category '} {F : Functor 𝔻} where
@ -94,16 +92,15 @@ module _ ( ' : Level) where
; _∘_ = _∘f_
-- What gives here? Why can I not name the variables directly?
; isCategory = record
{ assoc = λ {_ _ _ _ f g h} assc {f = f} {g = g} {h = h}
{ assoc = λ {_ _ _ _ F G H} assc {F = F} {G = G} {H = H}
; ident = ident-r , ident-l
}
}
module _ { ' : Level} where
Catt = Cat '
module _ ( 𝔻 : Category ') where
private
Catt = Cat '
:Object: = .Object × 𝔻 .Object
:Arrow: : :Object: :Object: Set '
:Arrow: (c , d) (c' , d') = Arrow c c' × Arrow 𝔻 d d'
@ -119,10 +116,10 @@ module _ { ' : Level} where
instance
:isCategory: : IsCategory :Object: :Arrow: :𝟙: _:⊕:_
:isCategory: = record
{ assoc = eqpair C.assoc D.assoc
{ assoc = Σ≡ C.assoc D.assoc
; ident
= eqpair (fst C.ident) (fst D.ident)
, eqpair (snd C.ident) (snd D.ident)
= Σ≡ (fst C.ident) (fst D.ident)
, Σ≡ (snd C.ident) (snd D.ident)
}
where
open module C = IsCategory ( .isCategory)
@ -136,35 +133,38 @@ module _ { ' : Level} where
; _∘_ = _:⊕:_
}
proj₁ : Arrow Catt :product:
proj₁ : Catt [ :product: , ]
proj₁ = record { func* = fst ; func→ = fst ; isFunctor = record { ident = refl ; distrib = refl } }
proj₂ : Arrow Catt :product: 𝔻
proj₂ : Catt [ :product: , 𝔻 ]
proj₂ = record { func* = snd ; func→ = snd ; isFunctor = record { ident = refl ; distrib = refl } }
module _ {X : Object Catt} (x₁ : Arrow Catt X ) (x₂ : Arrow Catt X 𝔻) where
module _ {X : Object Catt} (x₁ : Catt [ X , ]) (x₂ : Catt [ X , 𝔻 ]) where
open Functor
-- ident' : {c : Object X} → ((func→ x₁) {dom = c} (𝟙 X) , (func→ x₂) {dom = c} (𝟙 X)) ≡ 𝟙 (catProduct C D)
-- ident' {c = c} = lift-eq (ident x₁) (ident x₂)
x : Functor X :product:
x = record
{ func* = λ x (func* x₁) x , (func* x₂) x
{ func* = λ x x₁ .func* x , x₂ .func* x
; func→ = λ x func→ x₁ x , func→ x₂ x
; isFunctor = record
{ ident = lift-eq x₁.ident x₂.ident
; distrib = lift-eq x₁.distrib x₂.distrib
{ ident = Σ≡ x₁.ident x₂.ident
; distrib = Σ≡ x₁.distrib x₂.distrib
}
}
where
open module x = IsFunctor (x₁ .isFunctor)
open module x = IsFunctor (x₂ .isFunctor)
-- Need to "lift equality of functors"
-- If I want to do this like I do it for pairs it's gonna be a pain.
postulate isUniqL : Catt [ proj₁ x ] x₁
-- isUniqL = Functor≡ refl refl {!!} {!!}
isUniqL : Catt [ proj₁ x ] x₁
isUniqL = Functor≡ eq* eq→ eqIsF -- Functor≡ refl refl λ i → record { ident = refl i ; distrib = refl i }
where
eq* : (Catt [ proj₁ x ]) .func* x₁ .func*
eq* = refl
eq→ : (λ i {A : X .Object} {B : X .Object} X [ A , B ] [ eq* i A , eq* i B ])
[ (Catt [ proj₁ x ]) .func→ x₁ .func→ ]
eq→ = refl
postulate eqIsF : (Catt [ proj₁ x ]) .isFunctor x₁ .isFunctor
-- eqIsF = IsFunctor≡ {!refl!} {!!}
postulate isUniqR : Catt [ proj₂ x ] x₂
-- isUniqR = Functor≡ refl refl {!!} {!!}

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@ -10,7 +10,7 @@ open import Cubical
module Equality where
module Data where
module Product where
open import Data.Product public
open import Data.Product
module _ {a b : Level} {A : Set a} {B : A Set b} {a b : Σ A B}
(proj₁≡ : (λ _ A) [ proj₁ a proj₁ b ])

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@ -48,8 +48,8 @@ module _ { ' : Level} { 𝔻 : Category '} where
Functor≡ : {F G : Functor 𝔻}
(eq* : F .func* G .func*)
(eq→ : PathP (λ i {x y} [ x , y ] 𝔻 [ eq* i x , eq* i y ])
(F .func→) (G .func→))
(eq→ : (λ i {x y} [ x , y ] 𝔻 [ eq* i x , eq* i y ])
[ F .func→ G .func→ ])
-- → (eqIsF : PathP (λ i → IsFunctor 𝔻 (eq* i) (eq→ i)) (F .isFunctor) (G .isFunctor))
(eqIsFunctor : (λ i IsFunctor 𝔻 (eq* i) (eq→ i)) [ F .isFunctor G .isFunctor ])
F G