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agdaproofs/Groups/Subgroups/Definition.agda
2019-11-03 17:12:48 +00:00

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{-# OPTIONS --safe --warning=error --without-K #-}
open import LogicalFormulae
open import Setoids.Setoids
open import Functions
open import Agda.Primitive using (Level; lzero; lsuc; _⊔_)
open import Numbers.Naturals.Naturals
open import Sets.FinSet
open import Groups.Definition
open import Groups.Homomorphisms.Definition
module Groups.Subgroups.Definition where
record Subgroup {a} {b} {c} {d} {A : Set a} {B : Set c} {S : Setoid {a} {b} A} {T : Setoid {c} {d} B} {_·A_ : A A A} {_·B_ : B B B} (G : Group S _·A_) (H : Group T _·B_) {f : B A} (hom : GroupHom H G f) : Set (a b c d) where
open Setoid T renaming (__ to _G_)
open Setoid S renaming (__ to _H_)
field
fInj : SetoidInjection T S f