A / grp_kernel phi ≅ grp_image phi. Proof. exact (Build_GroupIsomorphism _ _ grp_image_quotient _). Defined.
Require Import Basics Types. Require Import Truncations.Core. Require Import Algebra.Congruence. Require Import Algebra.Groups.Group. Require Import Algebra.Groups.Subgroup. Require Import HSet. Require Import Spaces.Finite.Finite. Require Import WildCat. Require Import Modalities.Modality.