Order preserving maps between large preorders

Content created by Egbert Rijke and Fredrik Bakke.

Created on 2023-05-10.
Last modified on 2023-05-16.

module order-theory.order-preserving-maps-large-preorders where
Imports 
open import foundation.universe-levels

open import order-theory.large-preorders

Idea

An order preserving map between large preorders from P to Q consists of a map

  f : type-Large-Preorder P l1 → type-Large-Preorder Q (γ l1)

for each universe level l1, such that x ≤ y implies f x ≤ f y for any two elements x y : P.

Definition

module _
  {αP αQ : Level → Level} {βP βQ : Level → Level → Level}
  (γ : Level → Level)
  (P : Large-Preorder αP βP) (Q : Large-Preorder αQ βQ)
  where

  record hom-Large-Preorder : UUω
    where
    constructor
      make-hom-Large-Preorder
    field
      map-hom-Large-Preorder :
        {l1 : Level} → type-Large-Preorder P l1 → type-Large-Preorder Q (γ l1)
      preserves-order-hom-Large-Preorder :
        {l1 l2 : Level}
        (x : type-Large-Preorder P l1)
        (y : type-Large-Preorder P l2) →
        leq-Large-Preorder P x y →
        leq-Large-Preorder Q
          ( map-hom-Large-Preorder x)
          ( map-hom-Large-Preorder y)

  open hom-Large-Preorder public

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