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large-frames.lagda.md
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large-frames.lagda.md
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# Large frames
```agda
module order-theory.large-frames where
```
<details><summary>Imports</summary>
```agda
open import foundation.dependent-pair-types
open import foundation.identity-types
open import foundation.large-binary-relations
open import foundation.sets
open import foundation.universe-levels
open import order-theory.greatest-lower-bounds-large-posets
open import order-theory.large-meet-semilattices
open import order-theory.large-posets
open import order-theory.large-preorders
open import order-theory.large-suplattices
open import order-theory.least-upper-bounds-large-posets
open import order-theory.meet-semilattices
open import order-theory.posets
open import order-theory.preorders
open import order-theory.suplattices
open import order-theory.top-elements-large-posets
open import order-theory.upper-bounds-large-posets
```
</details>
## Idea
A **large frame** is a large [meet-suplattice](order-theory.meet-suplattices.md)
satisfying the distributive law for meets over suprema.
## Definitions
### Large frames
```agda
record
Large-Frame (α : Level → Level) (β : Level → Level → Level) (γ : Level) : UUω
where
constructor
make-Large-Frame
field
large-poset-Large-Frame :
Large-Poset α β
is-large-meet-semilattice-Large-Frame :
is-large-meet-semilattice-Large-Poset large-poset-Large-Frame
is-large-suplattice-Large-Frame :
is-large-suplattice-Large-Poset γ large-poset-Large-Frame
distributive-meet-sup-Large-Frame :
{l1 l2 l3 : Level}
(x : type-Large-Poset large-poset-Large-Frame l1)
{I : UU l2} (y : I → type-Large-Poset large-poset-Large-Frame l3) →
meet-is-large-meet-semilattice-Large-Poset
( large-poset-Large-Frame)
( is-large-meet-semilattice-Large-Frame)
( x)
( sup-has-least-upper-bound-family-of-elements-Large-Poset
( is-large-suplattice-Large-Frame y)) =
sup-has-least-upper-bound-family-of-elements-Large-Poset
( is-large-suplattice-Large-Frame
( λ i →
meet-is-large-meet-semilattice-Large-Poset
( large-poset-Large-Frame)
( is-large-meet-semilattice-Large-Frame)
( x)
( y i)))
open Large-Frame public
module _
{α : Level → Level} {β : Level → Level → Level} {γ : Level}
(L : Large-Frame α β γ)
where
large-preorder-Large-Frame : Large-Preorder α β
large-preorder-Large-Frame =
large-preorder-Large-Poset (large-poset-Large-Frame L)
set-Large-Frame : (l : Level) → Set (α l)
set-Large-Frame = set-Large-Poset (large-poset-Large-Frame L)
type-Large-Frame : (l : Level) → UU (α l)
type-Large-Frame = type-Large-Poset (large-poset-Large-Frame L)
is-set-type-Large-Frame : {l : Level} → is-set (type-Large-Frame l)
is-set-type-Large-Frame =
is-set-type-Large-Poset (large-poset-Large-Frame L)
leq-Large-Frame-Prop : Large-Relation-Prop α β type-Large-Frame
leq-Large-Frame-Prop = leq-Large-Poset-Prop (large-poset-Large-Frame L)
leq-Large-Frame : Large-Relation α β type-Large-Frame
leq-Large-Frame = leq-Large-Poset (large-poset-Large-Frame L)
is-prop-leq-Large-Frame :
is-prop-Large-Relation type-Large-Frame leq-Large-Frame
is-prop-leq-Large-Frame =
is-prop-leq-Large-Poset (large-poset-Large-Frame L)
leq-eq-Large-Frame :
{l1 : Level} {x y : type-Large-Frame l1} →
(x = y) → leq-Large-Frame x y
leq-eq-Large-Frame =
leq-eq-Large-Poset (large-poset-Large-Frame L)
refl-leq-Large-Frame : is-large-reflexive type-Large-Frame leq-Large-Frame
refl-leq-Large-Frame = refl-leq-Large-Poset (large-poset-Large-Frame L)
antisymmetric-leq-Large-Frame :
is-large-antisymmetric type-Large-Frame leq-Large-Frame
antisymmetric-leq-Large-Frame =
antisymmetric-leq-Large-Poset (large-poset-Large-Frame L)
transitive-leq-Large-Frame :
is-large-transitive type-Large-Frame leq-Large-Frame
transitive-leq-Large-Frame =
transitive-leq-Large-Poset (large-poset-Large-Frame L)
large-meet-semilattice-Large-Frame :
Large-Meet-Semilattice α β
large-poset-Large-Meet-Semilattice large-meet-semilattice-Large-Frame =
large-poset-Large-Frame L
is-large-meet-semilattice-Large-Meet-Semilattice
large-meet-semilattice-Large-Frame =
is-large-meet-semilattice-Large-Frame L
has-meets-Large-Frame :
has-meets-Large-Poset (large-poset-Large-Frame L)
has-meets-Large-Frame =
has-meets-Large-Meet-Semilattice large-meet-semilattice-Large-Frame
meet-Large-Frame :
{l1 l2 : Level} →
type-Large-Frame l1 → type-Large-Frame l2 → type-Large-Frame (l1 ⊔ l2)
meet-Large-Frame =
meet-is-large-meet-semilattice-Large-Poset
( large-poset-Large-Frame L)
( is-large-meet-semilattice-Large-Frame L)
is-greatest-binary-lower-bound-meet-Large-Frame :
{l1 l2 : Level} →
(x : type-Large-Frame l1) (y : type-Large-Frame l2) →
is-greatest-binary-lower-bound-Large-Poset
( large-poset-Large-Frame L)
( x)
( y)
( meet-Large-Frame x y)
is-greatest-binary-lower-bound-meet-Large-Frame =
is-greatest-binary-lower-bound-meet-is-large-meet-semilattice-Large-Poset
( large-poset-Large-Frame L)
( is-large-meet-semilattice-Large-Frame L)
ap-meet-Large-Frame :
{l1 l2 : Level}
{x x' : type-Large-Frame l1} {y y' : type-Large-Frame l2} →
(x = x') → (y = y') → (meet-Large-Frame x y = meet-Large-Frame x' y')
ap-meet-Large-Frame =
ap-meet-Large-Meet-Semilattice large-meet-semilattice-Large-Frame
has-top-element-Large-Frame :
has-top-element-Large-Poset (large-poset-Large-Frame L)
has-top-element-Large-Frame =
has-top-element-Large-Meet-Semilattice
large-meet-semilattice-Large-Frame
top-Large-Frame : type-Large-Frame lzero
top-Large-Frame =
top-Large-Meet-Semilattice large-meet-semilattice-Large-Frame
is-top-element-top-Large-Frame :
{l1 : Level} (x : type-Large-Frame l1) →
leq-Large-Frame x top-Large-Frame
is-top-element-top-Large-Frame =
is-top-element-top-Large-Meet-Semilattice
large-meet-semilattice-Large-Frame
sup-Large-Frame :
{l1 l2 : Level} {I : UU l1} →
(I → type-Large-Frame l2) → type-Large-Frame (γ ⊔ l1 ⊔ l2)
sup-Large-Frame =
sup-is-large-suplattice-Large-Poset γ
( large-poset-Large-Frame L)
( is-large-suplattice-Large-Frame L)
is-least-upper-bound-sup-Large-Frame :
{l1 l2 : Level} {I : UU l1} (x : I → type-Large-Frame l2) →
is-least-upper-bound-family-of-elements-Large-Poset
( large-poset-Large-Frame L)
( x)
( sup-Large-Frame x)
is-least-upper-bound-sup-Large-Frame =
is-least-upper-bound-sup-is-large-suplattice-Large-Poset γ
( large-poset-Large-Frame L)
( is-large-suplattice-Large-Frame L)
large-suplattice-Large-Frame : Large-Suplattice α β γ
large-poset-Large-Suplattice large-suplattice-Large-Frame =
large-poset-Large-Frame L
is-large-suplattice-Large-Suplattice large-suplattice-Large-Frame =
is-large-suplattice-Large-Frame L
is-upper-bound-sup-Large-Frame :
{l1 l2 : Level} {I : UU l1} (x : I → type-Large-Frame l2) →
is-upper-bound-family-of-elements-Large-Poset
( large-poset-Large-Frame L)
( x)
( sup-Large-Frame x)
is-upper-bound-sup-Large-Frame =
is-upper-bound-sup-Large-Suplattice large-suplattice-Large-Frame
```
## Properties
### Small constructions from large frames
```agda
module _
{α : Level → Level} {β : Level → Level → Level} {γ : Level}
(L : Large-Frame α β γ)
where
preorder-Large-Frame : (l : Level) → Preorder (α l) (β l l)
preorder-Large-Frame = preorder-Large-Preorder (large-preorder-Large-Frame L)
poset-Large-Frame : (l : Level) → Poset (α l) (β l l)
poset-Large-Frame = poset-Large-Poset (large-poset-Large-Frame L)
is-suplattice-poset-Large-Frame :
(l1 l2 : Level) → is-suplattice-Poset l1 (poset-Large-Frame (γ ⊔ l1 ⊔ l2))
pr1 (is-suplattice-poset-Large-Frame l1 l2 I y) =
sup-Large-Frame L y
pr2 (is-suplattice-poset-Large-Frame l1 l2 I y) =
is-least-upper-bound-sup-Large-Frame L y
suplattice-Large-Frame :
(l1 l2 : Level) →
Suplattice (α (γ ⊔ l1 ⊔ l2)) (β (γ ⊔ l1 ⊔ l2) (γ ⊔ l1 ⊔ l2)) l1
pr1 (suplattice-Large-Frame l1 l2) = poset-Large-Frame (γ ⊔ l1 ⊔ l2)
pr2 (suplattice-Large-Frame l1 l2) = is-suplattice-poset-Large-Frame l1 l2
is-meet-semilattice-poset-Large-Frame :
(l : Level) → is-meet-semilattice-Poset (poset-Large-Frame l)
pr1 (is-meet-semilattice-poset-Large-Frame l x y) =
meet-Large-Frame L x y
pr2 (is-meet-semilattice-poset-Large-Frame l x y) =
is-greatest-binary-lower-bound-meet-Large-Frame L x y
order-theoretic-meet-semilattice-Large-Frame :
(l : Level) → Order-Theoretic-Meet-Semilattice (α l) (β l l)
pr1 (order-theoretic-meet-semilattice-Large-Frame l) =
poset-Large-Frame l
pr2 (order-theoretic-meet-semilattice-Large-Frame l) =
is-meet-semilattice-poset-Large-Frame l
meet-semilattice-Large-Frame : (l : Level) → Meet-Semilattice (α l)
meet-semilattice-Large-Frame =
meet-semilattice-Large-Meet-Semilattice
( large-meet-semilattice-Large-Frame L)
```